Are all telegram gigs scam?

I've been trying to get myself a side gig I can do in my free time.

Countless offers pop up in facebook groups, internet ads etc. and like 99% ask you if you have Telegram. I never used telegram, don't know what it stands for as a communication medium but it always sounded extremely sketchy to me and I end up not going further.

Am I right in my assumption or Telegram businesses can actually be legit?