Almost all cryptocurrency businesses will do the same. Just like if Brave ever would flag/suspend your account, they wouldn’t explain why. They likely would have direct you to https://support.uphold.com/hc/en-us/articles/360045765351-Why-we-block-or-restrict-accounts-and-how-to-reduce-the-risk and that’s where things end. They don’t actually have to explain to you and they find that going into specifics usually only leads to arguing or to people using it to try to learn how they got caught (if they were doing things wrong) and then to try to prevent detection in the future.
No, you can’t. You might find it helpful to check the links below to parts of a FAQ I wrote. It talks about why KYC/AML is required, why we can’t receive Rewards to Wallet, and also why we can’t link to Binance or other exchanges at this time.