Hey, sorry for the late reply.<p>Just to clarify, I didn&#x27;t have the same idea, I had the idea that I wanted to make sure I was learning the material, I&#x27;m not sure&#x2F;convinced a quiz is the way to do it, but at least you are doing something. I just had a thought and too many other projects :)<p>There may be a lot of book recommendation products out there, but name one. I&#x27;m not suggesting you build a book recommendation product but as a side-effect of your product, you could help people to buy more books.<p>The difference between blinklist and bookgym is that they are selling access to the content. Sure, it isn&#x27;t the real thing, it&#x27;s like they are selling a knock-off. Not as good as the real thing, but you&#x27;re getting it cheaper.<p>For one, I wouldn&#x27;t spend $10&#x2F;year for what is currently there. And I don&#x27;t see how you can scale without crowd-sourcing, so you&#x27;ve got a bit of a chicken&#x2F;egg problem where people won&#x27;t want to pay until you have content, but you won&#x27;t have content until you have people supplying it, whom you&#x27;re expecting to pay.<p>I completely agree with you not creating a ton of quizzes at the moment, until you see the market is interested. That&#x27;s the right thing to do. But you also have to be able to measure market interest, which is a bit difficult to do without content. I don&#x27;t have a clear answer for you there.