Basic Access is a free trial membership for Pirates Online.
Pirates who are Basic Access can be identified by their name being in gray, as opposed to blue for Unlimited Access.
They also can only use Crude items, (but still may collect common, rare, famed, and legendary items - including Cursed Blades). They will be unable to use the items unless the account is upgraded to Unlimited Access which allows full access to all game features - if they are to find any item that is not crude, there will be an 'Unlimited Access Only' note on the bottom of the item card.
Note: As long as you were an unlimited access player and completed the Raven's Cove Story Quest, you will still be able to loot Cursed weapons, as an unlimited member or basic.
If a player does not maintain their unlimited account, their pirate will return to Basic Access. Their Notoriety level will remain, but all Unlimited items will be useless.