Now the clause is completely absent in any of the new ToS, which means that users are obligated to any changes Unity made to their services regardless of version numbers including pricing updates such as the recent fee that will charge developers per game install.
No, it doesn’t. Just because Unity decide to update the terms and conditions does not mean that users are obligated to accept new terms.
Getting rid of the previous versions just makes it harder for unity to enforce any terms on previously signed agreements.
It’s akin to a TV comedy when someone grabs a contract and eats it thinking it will void the contract. If they do try to sue anyone using older versions with that TOS, it should be fun to see how it plays out in court.
Unfortunately, unity has enough money to drag heels in court, and out spend many smaller companies that would try