There is some common knowledge about how to win the contest (at least in theory).
1. For multiplier, go for at least 5,000x max-win because you can't win multiplier contest if you play 500x or 1,000x max-win games.
2. For max hit, you can play medium volatility with higher bet, $1 for example since you don't need a massive multiplier.
3. For bonus buy, go for minimum buy, $10 previously.
That's about it, and you need decent bankroll if you aim for #1. If only for last place, or for fun, I deposit only ~$80.
Thanks for ur explanation, honestly I don't interest to join the competition because I know that I'm still a newbie but overall I am interested to know more about slot strategies. Is it really more profitable to play slots in gambling site competitions or without competition? I've tried fun play on several sites and next time I really need some guider to become better at gambling. Please help me, next bro.