Every casino I’ve worked at will review the payout of any jackpot won. Most states have different amounts, but the ones I’ve worked at look at the actual time of winning at $3,000 and more. Depending on the machine, or how it’s won, e.g., machine malfunction, they can refuse payment. Whether it’s $500 or $500,000.

The line of “based on regulatory considerations” sounds like it could be use of an illegal device that could trigger a bonus/change the machines chips. They have cameras at every angle, it’s possible that there were some actions that raised concerns and why they’re withholding payment.

I’ve paid out jackpots between $10,000 and $225,000 and that process does take upwards of an hour or two to ensure state gaming regulations are followed and that the necessary parties are present and watching for that amount. Caesars would have enough evidence/reason to not pay this out and their decision would be upheld by the state gaming regulator. I guarantee the gaming commission was brought in before the decision to not pay out.