[jayfehr]

Reddit used to be big on karma parties, so when Dropbox first increased the limit from 5GB to 10GB I figured I would try a Dropbox party. I posted my referral link and encouraged others to do the same. A couple hours later I had maxed out my referrals. Since then I've seen others try, and at first they were well received but now they get downvoted pretty quickly.

Anyway, I guess my point is to try and see if other sites you visit will allow threads to share Dropbox invites. It is spam but since the referrals benefit both the invitee and inviter evenly some forums may allow it.

edit: I see there are some comments in thread already doing just that.