If you want to gamble with $100 then many casinos do not ask you for KYC for example Shuffle.com does not ask for KYC for now... but they can ask for your KYC at any time, but this usually happens when you get into trouble.

There are some casinos that implement free withdrawals, as I know Sportsbet with a free withdrawal minimum withdrawal of 0.001BTC

I think almost all casinos have sports betting now... So just choose which casino you like... because everyone will recommend you.