I'm wondering, if you are accepted for the program with one website, can you insert the codes on other websites you own as well?
Yes you can - similar to Adsense.
Programmer, web developer and entrepreneur.
You might want to set up separate tracking IDs for each site. That way, you can see which sites are generating commissions.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin