Since its inception, App.net has been working hard to improve its growing platform, giving all of its paid users a 10GB bucket of cloud storage and opening up its File API so devs could use the data stored there. Today, folks wanting in on the fledgling social platform can do so without paying the $36 annual fee -- provided you can score an invite from a paying member. And, there's something in it for paid accounts who refer folks. Both the inviter and invitee get an extra 100 MB
