You spent some time putting together the friends inviter plugin but you seemed to have missed the most OBVIOUS feature: a way to track how many applications an individual gets from their invitations.
Which is why you simply need to do an Affiliate Marketing Plugin. Give members the ability to market a link that would track their advertising:
example: www.moosocial.com?uid=4531. Then the site owner can decide what reward the advertiser gets. Be it credits from your credits plugin or just flat out money.
Maybe you are already working on this. If so can you tell me when the plugin is expected?
Thank you!
In my scenario I pay my users real money if a certain treshold value has been reached. I remove the credits from their account or users may spend their earned credits on certain site activities.