Wouldn't it make sense then to also make desktop clients and to push traffic from the browser to the desktop client. Sort of similar to Reddit's annoying push to drive mobile traffic to their app.
(Some people get all their internet from Facebook, it sort of goes back to the AOL internet portal days.)
Also, Google already did this. It's called Chrome. They cleverly started it out as a better browser that allowed all extensions, and they've transitioned it into a browser that favors Google ads and makes it harder to block ads in general (compared to Firefox anyway).
So the amount of effort to maintain a desktop client(s) now becomes a big hassle if nobody is using it.