I just want to say that I think 7 days might not be enough time. just 7 days after playing you can no longer join up with the hundreds of thousands of veterans for the Refer-A-Friend quest, now you have to search for the Referees, which are very scarce. Maybe if Bungie extended the time limit to maybe 14 days or even a 30 days it would be much easier for us to find referees.