Following the hint from Zecoxao a few days ago, Scene member egycnq has shared a technique to enable multiple consoles on the same account, technically allowing game sharing on as many consoles as one wants. The technique allegedly works on both PS4 and PS5.
Although we have not tested that this works (and we don’t recommend you do this with your personal account. Or your own PS4/PS5, for that matter), PS4 hacker Abkarino confirms the technique is legit. It has apparently been used wildly by stores. We assume these stores activate many consoles with a legit account that has dozens of games, download these games, then sell the consoles loaded with free games. Scene members apparently decided to reveal the technique as a way to prevent this and get it patched by Sony.
Yes this is 100% real and they are using a bug in activation system that maybe fixed even without firmware update.
— Abkarino (@AbkarinoMHM) March 26, 2021
There’s no question Sony will take action on this, if not by patching the problem, at least by taking action on accounts that use the trick (possibly by banning accounts or consoles). And in the past they’ve taken legal action against stores that resold consoles with pirated games.
As for the method, as it is described by egycnq:
The Playstation Account mangment system not let you remote deactivate any console more than once every 6 months but there is a bug that lead to remote deactivate any primary console unlimited number of times
Steps for PS4 :
1-login to a PSN account on console <A> then active it as primary then deactivate it.
2-login to the previous PSN account on console <B> then active it as primary.
3-on console <A> go to account mangment then try to active the account as primary it will ask you to change to this console , accept >> now we remote deactivate console <B> .
4-on console <A> deactivate the account then try to use the account on another console <C>.
5-on console <C> active the account as primary.
6-return to console <A> go to account mangment then try to active the account as primary it will ask you to change to this console , accept >> now we remote deactivate console<C>.
if we repeat the steps we can see that console <A> have the ability to remote deactivate any other console have the same account unlimited number of times due to a bug functionality of [Change to this ps4 option]
with the same idea you can use it for PS5 as well
Again, we advise against even trying to use this, as you run the risk of getting your account banned, or worse.
Source: egycnq on /talk