Would not call Spin n Gos crazy, but they are clearly more targeted at recreational poker players than those, who are very serious about the game. There is the excitement of the lottery type spin, and then its all over in less than 10 minutes, so you dont need to commit a large about of time. I personally dont like Spins all that much. I once gave them a shot at PokerStars and played 8 1$ Spins in a row, and I really felt like, I was pulling the handle on a slot machine. Its a very fast way to generate rake, which is probably why, poker sites like them so much