I personally think that the cashback system plays the most important role for a casino site nowadays. Because almost all gamblers lose their bet at some point of time while playing gambling, in this case gamblers will be most attracted to the site if they are given some percentage cashback of their loss amount. i think this is a potential strategy. Because I myself personally look for such sites
In fact not many bitcoin casino offers cashback, most bitcoin casino offers rakeback. I prefer to have rakeback than cashback because rakeback gives players something back based on the wagering activity regardless how is the overall profit. It means that losing and winning players will still get something back. Cashback might be something attractive for whales but for small players like me, the amount of cashback won't be big since I won't lose a big amount of money, that's why rakeback is a better one than cashback.
Both rakeback and cashback are ways to give back to the players, Rakeback gives back to players based on the amount wagered but in any case, how much rakeback will a player who wagers a small amount get since the percentage calculation is based on the total wagered amount?
-So ultimately both terms are other means for the casino to make more money since players will want to wager a big accumulated amount to be able to get a tangible amount in rakeback/cashback.
-It's a win-win situation for casinos even though it may not be in all cases because some players can get lucky to have won their bets and at the same time get a cash back on the same bets.