Rejoice, fans of free for all sandbox MMOs, because Aventurine has a proposition for you. If you’ve departed Darkfall for any reason in the past, you are cordially invited to come back and experience the changes that have occurred in your absence. The instructions are relatively simple:
Anyone who does not have a currently running subscription needs simply login via the Account Management Page, ( here for European accounts, and here for US accounts) click on the button to activate your free days, and enjoy the benefits of our Happy-Hour weekend! All running subscriptions will automatically have 3 free days added to their account and don’t need to take any action other than to log-in.
The welcome back weekend lasts from Friday to Monday, according to the email sent out by Aventurine to past subscribers. In addition, players will partake in 400% experience gain, plus a massive increase in drop-rates and items dropped by foes.
So what do you have to lose? Other than everything equipped and on your inventory.
MMO Fallout 
The button to activate free days is not working it freezes up in the “Please Wait” stage.
I’m looking into it, there are probably a lot of people trying to process their accounts right now.