The size of your bet is important. As I mentioned before, I had bonus rounds or free spins more often when my bet was small and it even won me big sometimes. I had $50 no deposit bonus from Golden Cherry Casino. I bet 60 cents per spin on Pigkin Payout game and won $500 on its 5 free spins. It's suck that the max cashout was only $250. I played Bank Heist 1 right after that big win, then I beat the playthru easily.
Golden Cherry Casino is sister casino of Mayflower/Winpalace casino. Even thought, it used Rival software, but their payout is just like Mayflower/Winpalace casino payout's policy which might be at least 6 business days. I'll update as soon as I'll get paid.