Yeah , first thank you for your suggestion !
but ,I think it may like this one: Promotion Link
In the Admin CP>> Basic Conf. >> Credits >> line call "Extend Policies"
At Promotion Link Visit(+) Promotion Link Register(+) , it said "Credits given to the member for each visiter through his promotion link..."
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It means ,emm ,example :
first ,you add a new credit : extcredits3, named
Promotion Value, click on the
Enable this Credits and
Show In Threads,submit then .
second ,set the credits , here,the important thing is set the extcredits3 (Promotion Value) ,
And then you put the Promotion Link Visit's link (or Register's link) on other websites ,
and then ,there's one person click this link vist your forumgogo forum ( or Register on your forum from this link ) .
then, the member's Promotion Value will add 5 (or 10 ) credits .
so,From this function ,you can know the member who introduce forum to new member.
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do you think it works ?