Okay, guys, from what I know of itch.io and what I read, I think he's only saying "if you share the key, you don't OWN the files". You still need to download files if you "own" or "claim" a game on itch.io (I'd claimed a few games, free ones mind you, on there and it just shows me downloads), but claiming a game on there means it's tied to your account, like if you buy a key for Steam or GoG or something.
So unless I'm completely wrong, I don't think anything changed beyond what page you download off. I've never heard of a Renpy encryption, only a self-terminating file. And, not to be insulting, but I doubt Hyao would be smart enough to program in a suicidal script SPECIFICALLY for anti-piracy (especially given various AAA developers did stuff like this and ended up having paying customers suffer too due to errors in the script).
That said, I suppose he could add an additional file that denies play unless a password is entered. It's not that hard to do, it's like 9 lines of script, even I could do it and I suck at Renpy coding. But, even then, it wouldn't be hard to share the password or even just crack open the files and find it (as passwords are "IF [password] = [exactcode] > game. Else: shut game" basically).
I don't think we have anything to worry about unless he implements third party software somehow, becomes the Rainman of Renpy coding, or finds an alternate way to block access.
