Brand new casino/sportsbook gives away 190K USD in rewards, but OP doesn't have enough BTC to buy Copper membership and hire someone to make a good looking announcement thread? Sounds suspicious to me, but let's assume that OP is too focused on other marketing channels.
Of course it will be suspicious if they are giving it away but in fact they dont give it away because it is total reward for their contest (wagering contest) so saying they are giving away money is not true.
One more thing, not all new comers in this forum know about copper membership, so it is reasonable if they came here without it until someone from this forum tell them about it (they have done it though).
I have nothing to do with them so dont ever think that I'm trying to defend them, just trying to neutral in general point of view.