This is one of them that I remember from 2016:

https://www.theguardian.com/media-network/2016/dec/02/battle...

I don’t see how even Facebook could have an issue with “telegram” being used commercially, but I wouldn’t be totally surprised if they did.

Deep in Meta HQ: "How dare the metric system infringe on our IP"

Telegram has probably sufficient money, so that threatening them into doing what FB/Meta wants does not work. They only go after small enough fish, preying on the weaker.

and other things like storygram, thefoodygram, picturegram, etc.

Not sure I want to post my domain but a bit of research will get you there if you want to confirm it. An Austrian news outlet wrote about the threat when I was involved.

And, I just had a look, here’s an article by someone (not me) who seemed to experience the exact same threat: https://killdozer.medium.com/facebooks-shame-o-gram-8e71106c...