Only because someone else "pay" for all of us in form of donation, source-code contributor, tester, host mirror server (such as mirror of linux software repository) and run node (such as Tor relay)
True, but it's not like you are being forced in to either paying or giving up your privacy. Thanks to the work of other generous individuals, you can keep your privacy intact without having to spend a penny.
if a company wants to integrate crypto payments whilst operating or having its users living in a country that requires KYC, they have to abide by their terms regardless of what they focus point of the company is.
That's fine, and if they want to go to the KYC route, that's fine too. But they can't then push themselves as a privacy browser and use the headline "You are not a product" on their landing page.
I think it's mostly due to the locations of these services. KuCoin, Huobi, Binance, outside of the United States, whereas Brave is.
Fair enough, but as malevolent says, it's quite disappointing they have just taken the easiest route for themselves at the expense of their user base. As I said, there are plenty of exchanges and services which don't require KYC as long as you don't touch fiat. Brave could have been another one with a bit of work on their part. Instead they chose to compromise the privacy of some of their users.