The Polymarket PR team probably banking on the hopes that this egregious mistake/fraud/scam will just fade away with time. And they are probably right. The reality is, most people are selfish, and only really care about things that directly affect themselves... so they are right to assume that this will have a short shelf life since very few were actually negatively affected.
But this will be an interesting case study in the persistence of public opinion that is almost unanimously against the outcome vs a company that went from $1 bn market cap to $20 bn market cap almost overnight and easily has the means to do the right thing should they choose to.