best bonus if you want to transfer between sports and casino

Ran into a snag with bonuses that let you play both sides - sports and casino. When I bet on sports, sometimes I get the urge to dip over and throw a little on live roulette, just for a change of pace. But most of these promos seem either tied up with sky-high rollover for sports, or the casino side locks you out of using any winnings on the sportsbook. Feels like the systems are rigged to keep things split.

Had a bonus last month where I cleared half the wagering requirements on football, then realized the small print said my casino plays wouldn’t count at all. Another time, I tried swapping the other way - moved some blackjack winnings to the sportsbook, only to be told those chips were “non-transferable.” Gets real confusing, since they pitch the bonus as “one wallet,” but the rules say otherwise once you dig in.

Anyone actually had luck with a bonus that’s smooth jumping from sports to casino and back without getting tripped by some sneaky clause?