There seems be a trend nowadays to offer signup bonuses to newly registered users as I saw the same thing with another casino. Too bad that old players are excluded; hopefully they launch a new bonus soon (like deposit bonus) for everyone.
Lots of casino offer free spin bonus. Some casino offers free spin to all players for there deposit like Fortunejack and Winz.io. While some casino like Blackjack.fun offers free spin no string attached by just voting and chatting in there chat box. You can still try other casino if you want to enjoy this kind of bonus. But most of the players won’t pay attention to that and rather focus on VIP rewards because that’s what give most bonus to all the players especially high roller in Roobet.