They might also be operating at a loss afaik, but I suspect they're one of the few that can break even just based on scale, brand recognition, and economics.
I’ve seen 100 to 200 million active users, but nothing about paid users from them. The surveys I saw when doing a quick google search reported much less than 1% of users paying.
https://seekingalpha.com/news/4007459-microsoft-backed-opena...
I’m also very curious how much of that money is VC money coming from startups trying to build their customer base, vs how much actually sustainable.