引用自 Vigilante：

If a game Changes its UELA after the normal refund window has passed how much is enough change that it should be eligable for refund again due to excessive change

as title just wondering if there is any provision for EULA changes After you have already purchased something

No. Nothing is too excessive.

引用自 Vigilante：

as title just wondering if there is any provision for EULA changes After you have already purchased something

No. If you have a problem with the EULA don't accrpt it and stop playing the game. If the EULA is unenforceable and is making ridiculous demands, talk to a lawyer.

Even if Valve were to want to weigh in, most user opinions about what should grant a refund would be unreasonable and self-serving.

Also, if you've played a game for dozens or hundreds of hours, having an ax to grind doesn't entitle you to a free game.

i can see both sides of it but if a game was " all your user data is yours and we won't share it"
then changed the EULA to "all your data is ours now and we can sell/use it however/wheverer we want"
fells like a big enough chance there might have been something already in place for those sort of things but i guess not