Does Maxim Bet at $2k and 3x seem worthwhile? https://maximbet.com/promotions/big-game-supersized-bonus
Napkin math says no if you’re taking standard deduction but yes if you’re itemizing. Promo EV is about $1600, and you have to place $6,000 worth of bets to unlock it, so if your bets outperform a ~27% loss rate, this is profitable.
Be sure that the cash bets you place are no shorter than −200 odds because −200 is the minimum odds to qualify towards to rollover requirement. Also, the bet you place with the site credit should be on long odds because the free bet does not return its stake.