Comment by fencepost

My biggest concern with things like this is that AFAICT their business model is kind of foggy. Quoting from their FAQ, "Pavel Durov, who shares our vision, supplied Telegram with a generous donation through his Digital Fortress fund, so we have quite enough money for the time being. If Telegram runs out, we'll invite our users to donate and add nonessential paid options to break even. But making profits will never be a goal for Telegram." https://telegram.org/faq#q-how-are-you-going-to-make-money-o...

That's a very nice sentiment, but it's not a sentiment that fills me with confidence that I can rely on the continued existence of the free thing they're giving me.