Do I get paid for the product sold through my site through PayPal? And do you deduct the amount tha

Do I get paid for the product sold through my site through PayPal?

And do you deduct the amount that goes to my affiliate from the money collected and send it to their Paypal?

And is this plugin Multi-Site? Meaning, if I created child blogs, can my child blogs have their own affiliate program running on their end? I use the New Blog Template plugin. So basically they could start their own affiliate selling the same products that I sell, right?