I guess people just wont be able to sell their FUN for awhile when that happens and continue to run the site as it is or they could probably add extra decimal there when it really comes down to that. As long as the site is partially running then its not really their fault if FUN goes down to 0 though.

Technically it just goes down to 0 sats but in term of usdt, its still has some value to it so its not really worthless but I doubt anything is going to change on their site. They will probably just disable the feature for a while saying they are fixing it or whatsoever