Whoever sits on it promotes whatever they want. Kill the king for whatever time he has left.
Your hours are yours until someone kills you. No refunds for the rest.
Your hours are yours until someone kills you. No refunds for the rest. The clock starts the second you sit.

Pick your hours. That is your price and your time on top. After 10 kills the season turns and every hour costs a dollar more.
His remaining hours at the price he paid. The longer he sits, the cheaper he gets.
No refunds for the rest. The clock starts the second you sit. Only if the throne got pricier while you were paying is the kill void and your money comes back.
Was your domain on the throne? It enters the directory forever, ranked by time on top, above everyone who never paid.