Doesn't feel much different than Google paying for being the default in browsers
1) search is much cheaper to serve than chat
2) chat is a less frequent usecase
3) google paid for entry into a locked ecosystem (apple. also to appear like they are not a monopoly). telegram is far from locked.
If people aren't paying for it, and you have to pay them to use it, what is the value? Russ Hanneman Silicon Valley pre revenue rant meme here