Simple design. But I think that the main thing here is the very essence of the game. Bet gives you a permanent chance to win. That's cool, I think.
I think that you can start with a small bet that will help you learn all the prospects of instant play, and determine the possibility of a larger investment.
This seems to me a good option for those who want to participate in the jackpot. I've seen that new entrants can win in an instant game by evaluating the champion's bet, so it can be profitable.