Look, I've been in the industry for 20 years. Chumba's not a scam, but it's not fully regulated either. Proceed with caution and never gamble more than you can afford to lose.
Hey! Check out "The Sword and The Grail" by Play'n GO. Medium volatility, Arthurian theme, and a cool progressive multiplier in the free spins. I love how you can get up to a 100x multiplier!