I make my living off of mobile freemium games. We don't do anything with replay timers or the like - we advertise, mostly, and have fun in-app purchases.
For a couple years we offered two versions of our apps - paid and free, free being ad supported. In a bid to simplify things and encourage more conversions, we switched to in-app purchase to get rid of ads. (Also, app stores had been optimized to push down app results for non-free games - plenty of reading out there about the causes and effects.)
To date, just under 5% of our revenue is paid. Despite playing for years, many people don't believe our games are worth $1.99. If you believe the race to the bottom will reverse itself, I'm here to tell you it won't. It's guided by the walled gardens and they like it this way.
We have had millions of downloads and on our most popular game, have abnormally long retention. Even some of our most die-hard players will not spend $1.99.
Maybe - MAYBE console gaming will one day return from F2P, but I doubt it. At least not in the near future - the industry is still moving towards it.
But in mobile gaming, success is a volume play. And the volumes won't part with $.99 in the traditional way. If they did, F2P wouldn't be a thing. And maybe gamers will pay for games, but the masses? Not so much.