However, most of the casinos will impose restrictions on free bets wins to prevent players from easily cashing out large amount out of the casino. One way to stop them is to increase the wagering requirement [...]
If you are a regular gambler here on the forum and see that the project holds a lot of simple and clear raffles and contests, I don't see any problems with making a deposit of 5 bucks... just so that the system recognizes you as a real player and not a bot.
I haven't seen anyone have problems with withdrawals in half a year (I'm not talking about mini amounts or bonus money) and I certainly haven't seen Whale request KYC from anyone (although their rules allow this). My personal account is completely anonymous from Whale management, but at the same time I withdrew about $8,000 very quickly and without any problems (but yes... I made deposits maybe for an amount half as much as mentioned).
As for the conditions for wagering free bets... these conditions are even more flexible than Sportsbet (1.5x versus 1.2x).
That's some simple math.