Appeal to emotion and thus an invalid argument. Give me a valuable app and I'll throw the dev $$$ by the fistfull. I fail to see how ads generate that much revenue.
They can generate a LOT of revenue for a popular app. (A lot more than zero!) And if YOU will pay "$$$ by the fistfull" to developers of quality apps, many OTHER people won't. Developers can't feed themselves off of people like you alone, so there IS room in the market for BOTH ad-support and paid apps.
You and I would both LIKE to live in a world where nothing was paid for by ads, and our favorite web sites and TV shows could keep on going without them. But that's simply not reality. Take away all ads and you'd take away a lot of what those ads pay for.
You prefer paid apps, which I understand completely--but many OTHER people prefer ad-supported, which is where I lean myself, as long as the ads are small. I use lots of excellent ad-supported free apps, including Pandora, Shazam, a number of games, and yes, AIM. Plenty of others I pay for directly, and gladly.
So why not offer people the choice? That's what AIM has done here--and since the early problems with AIM on iPhone seem to be gone, I think it's a worthy app whichever way you choose. Other messenger apps have their benefits too, of course.
I also don't have a problem with downloading a free app that later gets ads. The developer made me no promises (certainly not a promise to develop for free forever) and I paid them no money. Should I ask for a refund
I wish all apps were ad free, and cost nothing... and in fact paid me $50 a day to use them. I wish all developers worked for me expecting nothing in return.
Failing that, I'll take good apps, in whatever way the developer chooses to be paid for them--and I'm free to take it or leave it.