There was no logical reason to pay out early and was clearly an emotional decision by stake and now they're looking to make it difficult for Trump bettors by adding scenarios and conditions that shouldn't be applied because if everyone was waiting, there would be no "invalid" scenario. This is quite concerning and should not take place as I don't see any of these conditions on any mainstream legit betting platform and markets. predictit, paddy p, william h, betfair, are ALL either open or frozen waiting for congress to settle this afaik.
No logical reason? Lol. Are you living under a rock or something? Majority of the world has already acknowledged Biden and Harris as the POTUS and VP. Even the official results are matching the projections currently.
Books like Stake, Sportsbet etc who paid out Biden bets early are being applauded for taking risks and have improved their overall reputation while the books and exchanges that you mentioned are being criticised for late payments.