It's good to be paranoid about crypto and gambling, but there are a few misunderstandings here.
You can't send XMR to Minko from exchanges, because you need to create a subaddress in your own wallet as a return address.
There's no withdrawing of winnings. You don't have a balance at Minko. For every bet, you receive a percentage in return to the subaddress you submitted while registering. When you send your winnings to an exchange, they don't see where it's coming from; that's the whole point of Monero.
The owner and creator of Minko.to is not anonymous. It's Monero developer binaryFate. Real name: Jeremie Dubois-Lacoste. He did send the profits of the first month, 315 XMR, to the general donation fund.
Craig Wright says a lot of outlandish things. He's a scammer and bullshitter who counts on 1% of people believing 1% of what he says.
The Monero community did discuss whether Minko could affect the privacy of Monero transactions due to the high volume. A flood attack in which one party sends 80% to 99% of all transactions is the most realistic way to deanonymize Monero. But Minko can never send more than 50% of traffic, since there's an incoming payment for every outgoing payment. It would actually protect us against a real attacker who tried to execute a flood attack (which would be very visible and very expensive).