Not a lawyer but I'd imagine depends on the way they wrote the license. Like with software if someone open sourced something and then wanted to make it closed s

Not a lawyer but I'd imagine depends on the way they wrote the license. Like with software if someone open sourced something and then wanted to make it closed source, if they own the copyright 100% and you didn't violate the license you could keep using the current version but their new private changes you wouldn't get. So I'd imagine something similar unless the license expires after X time but that doesn't make sense in open source as haven't seen that other than in commercial closed source programs, and even then some programs still work but you won't get updates unless you pay to upgrade or a yearly maintenance fee. However you might want to document these things, heard once some copyright troll put images out under a free license and then changed their mind so went after websites using it.