i tried letting others use mine but none every made anything so i withdrew my offer, trust me its betetr to use your own on your own sites, it just didnt work out for me letting others.
This seems odd. I wouldn't let anyone use my code, although isn't it just a matter of looking at someones source code to take their code?
basically what the OP is offering is a revenue share - he'll send you a portion of the $ generated via YPN ads on your site with his code. and its not allowed by YPN.