Update: I then said a mail to tell them I was registered after May, to know if still part of Legacy.

Dear Customer,

Thank you for contacting the Square Enix Support Centre.


You should be eligible for the Legacy capaign if you have paid for 90 days before the release of FINAL FANTASY XIV 2.0.

We can only recommend that you continue to subscribe until the re-release of the game and if you are eligible you will be notified.

Kind Regards,

The SQUARE ENIX Support Centre Team


Thank you again for contacting us and for your interest in Square Enix products!
More help and information are available at the Square Enix Support Centre website.
http://support.eu.square-enix.com/



So I guess it's pretty settled that Legacy is not over as long as 90 days have been paid before 2.0
Hope that gives some people hope haha