yep, their symbol is a 'thin' dollar sign:) You get 1 coin when you start telegram, and get 10 coins when you refer someone,  and get 1 coin a day from faucet. Each coin is around 15 sat now.
For me, airdrops of existing coins are better than ICO airdrops which are 99% selling dreams with hyped prices, at least I know how much I will get in the end, even though it is small. I am not talking about scam ICOs or even scam airdrops