So much this... I had paid for an ad-free version of risk (which was great, could play a few turns at a time and no messing with all the setup and pieces) that started adding ads in. Well, mobile gaming isn't much use to me if it isn't something I can do a few minutes at a time, and I'll be damned if 1/2 of that time is wasted on ads.
Ive just taken to replaying old JRPGs from my childhood, they're very compatible with that playstyle. Sure, a battle may take 2-4 days to complete, but it's much more entertaining.
I think this is a huge reason a game like Clash of Clans has done so well. I could never get into it, but my brother has been playing steadily for 4 years. He likely only spends 10-15/year, but the devs haven't annoyed him enough to quit. It's the worst sort of pay-to-avoid waiting game, which is why I couldn't stand it, but somehow still less exploitative than most of the competing mobile games.
I'm just so disappointed that I'm carrying around a far more powerful device than even a PC from my childhood, and some of the best gaming experiences are old console games.