Yes, I’ve personally tried DragonSlots, and it is a legitimate option. I wouldn’t recommend it for sports bettors since it’s a pure casino, but it does offer an impressive selection of over 12K–13K slots, if I’m not mistaken. I tested their withdrawal once, and everything went good. You’ll also find plenty of slots with high RTPs.
For new players looking for the latest registration bonuses, contests, and campaigns, the best way to stay updated is by checking first their official Bitcointalk forum page. This way, you stay safe from fake and affiliate promotions.