Could these be unrealistic promises? Rewards in real money with no wagering requirements sound too good to be true. Casinos typically have wagering requirements to prevent bonus abuse.
And how we can verify that this online casino is licensed on the Telegram platform?
Good question because winning from free spins can be a big amount if the player has a great luck while playing it.
No wagering requirement is fine but if there is no other requirement/term behind the winning from the free spins, then yes it can be easily abused.
If I have to guess, there must be something like max amount to withdraw from the winning of free spins.
There can also be other requirement such as the deposit need to be wagered first in order to be allowed to withdraw.
OP needs to explain all the terms of this bonus to avoid confusion as well as to avoid possible complaints later.