I wish they would differentiate between one-time IAPs (e.g. DLC) and repeated IAPs (e.g. "freemium" in-game currency / powerups needed to do anything). I'm cool with paying once for expansions and other forms of in-game content, including upgrading a free demo into a full app, but have zero interest in pay-to-play grindfests built around being frustrating and letting you pay to temporarily stop the frustration.
I basically won't download a freemium game. I understand the business model and it not set up to provide value for your money. The business model is to get you to pay an irrational amount of money for the game. I did it once on a sniper game where I played for a bit, spent about $10 and then got to a point where I clearly had to either grind for weeks on the same levels I could already effortlessly clear, or I had to spend another $10 for a gun with enough range to hit enemies and open the next level. And I had no way of knowing if another barrier like that was going to crop up after another ten minutes of playing.
So I'm done with freemium games. I just won't touch them.