No-one here actually knows what agreements are in place to be able to publish Fortnite as a F2P title on PSN. Ergo we know Sony's culpability in this mess, but not Epic's, who could have agreements and NDAs in place so unable to even express their position.
Epic seem content to keep a low profile, why stick your head above the parapet when people are throwing shit around? Epic know they screwed up and very quietly have been unfucking things which are on them alone. Fortnite's support website
has a page warning of the dangers of unlinking a console platform, one of the consequences
now reads:
"If you disconnect your PSN ID, Nintendo account, or Xbox gamertag from the Epic account that it is currently connected to, any purchases that you have made, as well as stats and other save data, will be no longer accessible on that platform."
Prior to that update on 14 June that page was quoted in many forums, including posts on
resetera, as reading:
"If you disconnect your PSN ID, Nintendo account, or Xbox gamertag from the Epic account that it is currently connected to, any purchases that you have made, as well as stats and other save data, will be no longer accessible."
So until two weeks ago, disconnecting
any linked account (incl. Xbox and Switch) from Fortnite would have lost you all your purchases even if you had never linked it to a PSN ID.