

Yes, a creator can create a closed source copy (independent of the GPL’d work), assuming they have full ownership or permission from all contributors
It’s not fully academic only because it’s common for companies to develop a GPL version and offer commercial licenses where the corporate customer is exempt
But none of this affect the users of the GPL version, so most people don’t care







It shouldn’t generally be obvious they are blocked. Especially for texts (that aren’t RCS) they should learn nothing