arcadekidflo wrote:1 . Is the exploit game required only for the first installation of the eCFW then you can remove it and even delete the account ? Or the game needs to be there every time you boot into the eCFW?
You must have both the account and the game at all times.
arcadekidflo wrote:2. You can not disable the account from Vita because it can't acces PSN or there is no such option in the Vita menu ?
You can deactivate Vita from itself, but the games will stop working on a deactivated Vita, including the exploited game and eCFW. The deactivation should be done from PC instead: it will remove all Vitas from an account making room for 2 other Vitas to be activated. Previously activated Vitas must be kept offline so that they won't know that they've been deactivated and will work normally.
It all boils down to PSN account-specific act.dat file and game-specific .rif license files.
Each game has its own unique .rif file with account name inside; activated Vita has its own act.dat file also with account name inside. The game will only start if account names in both files match, that's why Vita must be activated AND the game (its .rif license file actually) must be present.
eCFW and custom bubbles don't have their own licenses and use legit game's license as their own, that's why legit game and PSN account are always required.