What headless is asking is very simple to understand but you guys keep beating around the bush so I will spell it out for you so you can understand ok:
Now lets say you got 20 webmasters doing this, and you have a break down like this:
webmaster 1 sends 25 signups
webmaster 2 sends 20 signups
webmaster 3 sends 15 signups
and on and on till you get from 1 to 20 webmasters...
now, the simple question is, webmaster1 sent 20 signups, what is his percentage of pay of that 100% of 50% from your 50%???
simple example:
webmaster1 = 20% payout from the 100% of the 50%
webmaster 2 = 15% payout from the 100% of the 50%
...
...
...
..
...
till finally you get down to webmaster20 who may only get .5% of the 100% of the 50%
has it sunk in yet?
