They&#x27;ve probably read this book: <a href="http:&#x2F;&#x2F;www.amazon.com&#x2F;Mobile-Social-Game-Design-Monetization&#x2F;dp&#x2F;1466598689" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;Mobile-Social-Game-Design-Monetization...</a><p>I did, but I try to do games that I like to play, trying to minimize obstacles for the players.<p>This doesn&#x27;t mean that the book should be burned; it has some great articles on how to improve usability or minimize friction.