The biggest problem you are having right now is the fact that many places do end up paying for Biden winners and you didn't which obviously created some PR problems since you were compared to other places that paid up while you didn't, aside from that there is no problems for you if you ask me.
That wont really be a huge problem for the site. This kind of stuff only happens in political bet in which case the result isnt clear yet so it takes longer time for the bets to settle and the reason that this bet is so hyped was because it was the US Presidential election. Other than that, I dont see any reason for people to be betting on a political bet.
People will eventually forget all about this and move on once they paid it out to the winners
If I voted for Biden, it would be okay for me to wait until the official announcement of the sitting of the winning president in the recent US elections is made.
I put some leftover for Biden on this site and Trump has probably less than 1% chance to win. Sooner or later, everyone that puts their money on Biden will be paid out eventually