I'm not really talking about IAP for upgrades but when they're used to buy expendables (be it coins, stars, bonus items, etc.). I'm fine with the "free with in-app paid upgrade" or the 'lite' version and 'full' version (though I find the former cleaner).
However, more often than not with games, IAP is used for expendables and more often than not, the gameplay now revolves around making you buy things, rather than the game itself. You have artificial scarcity on some things, not to make the game more interesting/difficult/rewarding but to make more money for the game author.
Don't get me wrong: I'm totally for developers and studios making money, but not when it skews the gameplay.
However, more often than not with games, IAP is used for expendables and more often than not, the gameplay now revolves around making you buy things, rather than the game itself. You have artificial scarcity on some things, not to make the game more interesting/difficult/rewarding but to make more money for the game author.
Don't get me wrong: I'm totally for developers and studios making money, but not when it skews the gameplay.