However, they ended up doing this so that it would be a bigger marketing deal. They needed a method where community is both aware that they are doing something in the NFT world and they would also do something community participates so they get a lot of attention at the same time. I believe $500 is nothing when you are getting this much people involved in multiple places, it totally worths it and I believe they are going to get a lot more in return as well so it is profitable too.
By the way, it's been a long time I haven't seen them congratulating the big slot winners, Last I've seen they prove a 10503x multiplier by wager 20 cents. As far I know, Slot is the most popular game also in Rollbit and Of course, we don't forget about it.