They can always find gullible users by sending those attractive offers and rewards.
Some will try for themselves for the hope that they will get good returns.
But unfortunately, it is a trap and they will get nothing in return.
Unsolicited emails and messages should automatically be put into trash.
The reason is because day by day users who are being desperate of getting instant money is increasing. They can be an easy target for scammers because scammers know that they are after an easy money. They just have to create a new way of attractive strategy then they can have now new victims. Even those who are being warned with this kind of scam can easily become a victim if they will be blinded by an easy money trick.
You are right and in fact when I visited the website I was wondering if they are really scam and thankfully OP mentioned about the minimum $100 deposit which made me feel strong that they are scam. They are even generating new deposit addresses and everything so it is really cool trick they are implementing to manipulate users but where they missed the track was sending such messages on telegram is too obvious that they are scammers.
I wonder since they have a working website why they don't normally run their casino and profit in the long run that too honestly and if they lack bankroll they could have contacted investors and I am sure anyone would have invested in a working casino that just lacks bankroll.