- ad supported, pay once to remove ads
- subscription model. Get basic features and maybe ads, pay some 2-5 dollars a month for premium features. These may or may not have a "lifetime" option which is basically pay once.
- the dying breed of "demo mode". You play X levels and then you pay once for a "full game".
- and then freemium models which is basically a free game with small and large tricks to encourage spending over time.This is probably where you are.
But outside of that, yes. There are still premium games you buy like a console game (they are often ports of console games). But it's a niche because they are competing against a sea of "free" games. And many mobile gamers do just want 10-20 minutes of a quick fix, not even long enough to get past tutorials in larger games.
Premium? Freemium? The few mobile apps that I bought since i got a smart phone are all pay once and most of them cost more than 0.99.
However, for example, I do not even bother to look at mobile games any more because I "know" they'll be an IAP crapfest.
And if i look at applications, it's because they have been mentioned and deemed useful by a third party i trust.