Just sharing from experience a lot of people.

Most people who are getting "KYC & Refunded for the deposit" are "Sportbooks" player. Because, I read in some situation sportsbook player can easily abused like odds or other abused activity as well. Now, If you comparing user who are playing "Livegames or Slot" we always have a  small chance to get a "KYC"

Even my self already register a few casino, have some withdraw with high amount money including "BK8" never getting KYC request.