This reminds me of when Urban Airship shut down their free transactional push notification service a while back.  It turns out theres so much more money in the marketing side than the transactional side (profit center vs cost center), and if you&#x27;re going to run a marketing company it doesn&#x27;t make sense to give away a service to people who will never become the type of customer you want.<p>We&#x27;ve been referring clients to mandrill for a long time on many different project and although a few have had enough success to hit the level where they start paying, for the most part it&#x27;s been just a giveaway.  It doesn&#x27;t make it any less painful for those clients that we now need to switch (especially the few that are using the inbound features - ugh) but I can see where they&#x27;re coming from in this change.