I'm pretty sure when I joined Whatsapp you could pay to have access for a couple of years, so it had a sustainable model, especially if they just turned the dial slowly on pricing.
I'm actually selling my Pixel 2 XL off to a friend after having it for 3 months, Google's got too creepy I'm switching back to my old 5s. As much as I hate the price, I have privacy.
If you have your own domain and don't send more than 10 emails (and a limit of 1GB) a day you can get Migadu, and I think it's $5 for upto 200 or something emails a day out (and practically everything is unlimited).
I still can't fully switch from GMail, but I've prepared myself so I have to since I'm gonna pay.
essentially the api will return all toots from whatever timeline you're asking it for, e.g. if your instance is federated with 5 servers, you'll get your timeline from people tooting from these servers, I think the "public" timeline (can't remember the exact name) is all the toots from all federated instances you federate with. So it would be the same data as the browser has.
I think the biggest problem for the app developers is an interface that lists a lot of instances that you can search for which you identify most with (I think some use a centralised list someone has created somewhere). But that's a bad UX to jump into as a new user.
Also if your coding guidelines can use emojis in commit message to mean a certain thing if you all have a common lookup and it becomes natural to see what a change affects. e.g. :bug: for fixing bugs
My car doesn't have Android Auto built in, only really bluetooth and Android Auto can launch at bluetooth, and mostly all those things. Dig around in the settings and have some fun. (though I'm not sure it has everything you'd want)
This. I got a false positive on Runescape about 4 years ago, they won't even let you appeal because it was a serious offence. Lost my best account, and they cancelled my membership. Never paid for the game again after that, on my new account.