What was the SG&A expense for Wingstop in 2020-Q4 
we're going to continue to invest. We want to make sure we have the right people in place to support the business and what we believe is strong growth coming out of this difficult time that we've all experienced. We do actually have a convention in 2021 planned, which is not in 2020 so that does impact the SG&A number, and then we'll continue to expand on technology and our international expansion. A lot of that comes in the form of leveraging third parties that can help us prepare the platform for the future.
And so we expect those investments to continue as well as making sure that our international partners in 2021 are still as well insulated as they can be from the effects of the pandemic. I would only say that we see the virus slowing down in the U.S., we see the vaccine performance. But if you look out across the world it is not the same story. And so we're cautious of that and making sure that we do everything we can to help them.
Chris O'Cull -- Stifel Financial Corp. -- Analyst
That's helpful, and then just a follow-up. We've heard a lot of brands that seek out Class A sites say that they haven't really seen a break in rents or any kind of improvements in location opportunities. Given that your model differs somewhat I'm curious if you're seeing a greater level of opportunity in Class B sites than you've typically seen?
Charles R. Morrison -- Chairman and Chief Executive Officer
Well, I think we've always seen a great opportunity in the Class B sites, which are Class A for us. So I thank our landlords across the country for providing us such opportunities to grow. But I do think that the market is going to continue to free up. I don't know that we're seeing substantially different rent rates overall, but we certainly have not seen them increase as we would have otherwise seen if we didn't have the pandemic in front of us or behind us. So I think it's pretty much stay the course. No real change there other than we've always had ample access to real estate.
Chris O'Cull -- Stifel Financial Corp. -- Analyst
Great. Thank you.
Operator
And our next question will come from Jared Garber with Goldman Sachs. Please go ahead.
Jared Garber -- Goldman Sachs -- Analyst
Hi. Thanks for taking the question. Many of mine have been asked and thanks -- have been answered, and thanks for all the color today. But want to just round up on the third-party delivery versus your white-label app digital ecosystem. Can you give any kind of breakdown on how that has trended throughout the -- maybe the fourth quarter, the breakdown of those two different channels and what you're seeing in terms of consumer behavior maybe similarities or differences on those channels?
Charles R. Morrison -- Chairman and Chief Executive Officer
Yes, there's really not much I would call attention to as to the mix between Wingstop.com-sourced occasions and those from our third-party delivery partner, DoorDash. They run about -- with the exception of Q2 last year, which was a bit of an anomaly, they've been running about a 60-40 split to the -- to DoorDash's marketplace over Wingstop. But again, I just remind ourselves, we're agnostic as to the platform they come from other than the information that we get about our guests, which I addressed in an earlier comment.
Jared Garber -- Goldman Sachs -- Analyst
Thanks. And just a follow up there. Curious if you're seeing -- from this free delivery promotions that you offered in the fourth quarter, are you seeing new customers sign-up or engage with the brand on the back of those or if you can tell based on the consumer data or is that more of the core, core consumer?
Charles R. Morrison -- Chairman and Chief Executive Officer
Yeah, I think regardless of the promotion we believe that delivery represents for the most part a new incremental customer to Wingstop who have not tried us before, and hence my comment about really growing the size of our database that's indicative of the performance of delivery.
Operator
And our next question will come from Jeff Farmer with Gordon Haskett. Please go ahead. Hello, your line may be
we're going to continue to invest. We want to make sure we have the right people in place to support the business and what we believe is strong growth coming out of this difficult time that we've all experienced. We do actually have a convention in 2021 planned, which is not in 2020 so that does impact the SG&A number, and then we'll continue to expand on technology and our international expansion. A lot of that comes in the form of leveraging third parties that can help us prepare the platform for the future.
And so we expect those investments to continue as well as making sure that our international partners in 2021 are still as well insulated as they can be from the effects of the pandemic. I would only say that we see the virus slowing down in the U.S., we see the vaccine performance. But if you look out across the world it is not the same story. And so we're cautious of that and making sure that we do everything we can to help them.
Chris O'Cull -- Stifel Financial Corp. -- Analyst
That's helpful, and then just a follow-up. We've heard a lot of brands that seek out Class A sites say that they haven't really seen a break in rents or any kind of improvements in location opportunities. Given that your model differs somewhat I'm curious if you're seeing a greater level of opportunity in Class B sites than you've typically seen?
Charles R. Morrison -- Chairman and Chief Executive Officer
Well, I think we've always seen a great opportunity in the Class B sites, which are Class A for us. So I thank our landlords across the country for providing us such opportunities to grow. But I do think that the market is going to continue to free up. I don't know that we're seeing substantially different rent rates overall, but we certainly have not seen them increase as we would have otherwise seen if we didn't have the pandemic in front of us or behind us. So I think it's pretty much stay the course. No real change there other than we've always had ample access to real estate.
Chris O'Cull -- Stifel Financial Corp. -- Analyst
Great. Thank you.
Operator
And our next question will come from Jared Garber with Goldman Sachs. Please go ahead.
Jared Garber -- Goldman Sachs -- Analyst
 Hi. Thanks for taking the question. Many of mine have been asked and thanks -- have been answered, and thanks for all the color today. But want to just round up on the third-party delivery versus your white-label app digital ecosystem. Can you give any kind of breakdown on how that has trended throughout the -- maybe the fourth quarter, the breakdown of those two different channels and what you're seeing in terms of consumer behavior maybe similarities or differences on those channels?
Charles R. Morrison -- Chairman and Chief Executive Officer
Yes, there's really not much I would call attention to as to the mix between Wingstop.com-sourced occasions and those from our third-party delivery partner, DoorDash. They run about -- with the exception of Q2 last year, which was a bit of an anomaly, they've been running about a 60-40 split to the -- to DoorDash's marketplace over Wingstop. But again, I just remind ourselves, we're agnostic as to the platform they come from other than the information that we get about our guests, which I addressed in an earlier comment.
Jared Garber -- Goldman Sachs -- Analyst
Thanks. And just a follow up there. Curious if you're seeing -- from this free delivery promotions that you offered in the fourth quarter, are you seeing new customers sign-up or engage with the brand on the back of those or if you can tell based on the consumer data or is that more of the core, core consumer?
Charles R. Morrison -- Chairman and Chief Executive Officer
Yeah, I think regardless of the promotion we believe that delivery represents for the most part a new incremental customer to Wingstop who have not tried us before, and hence my comment about really growing the size of our database that's indicative of the performance of delivery.
Operator
And our next question will come from Jeff Farmer with Gordon Haskett. Please go ahead. Hello, your line may be