mega joker slotThe Mega Joker slot machine offers gamblers different coin values of 10p, 20p, 50p, or $1. If your bet amount rises, the RTP rate will decrease from 99% to 96%.The Mega Joker slot machine offers gamblers different coin values of 10p, 20p, 50p, or $1. If your bet amount rises, the RTP rate will decrease from 99% to 96%.