I bought Sanctum pre-release and it turns out that was a major mistake. The game was released with 3 levels total at launch and they justified it by describing the 4 difficulty modes for each level as "additional content". Then not long after they released paid $DLC. I don't think I have ever been so angry at a purchase.
It is a good game and, yes, they gradually released a couple more free levels and stuff, but this company has a long way to go to earn my trust back. First impressions are tough to overcome.
"I love to go down to the schoolyard and watch all the little children jump up and down and run around yelling and screaming because they don't know I'm only using blanks."