Net. rakeback calculation

[risa]

I see an affiliate site, where they offer me 15% more rake back if I register from that site. They write: "we join to the playboy poker's affiliate program, so we will get 25% comission of your net.rake. We will give you 15% from that revenue and we keep the 10%."
The question is: how Playboy poker count that net.rakeback?
If I clear the $200 first deposit bonus, and I generate $500 rake, the site will get the 25% of the $500-$200=300$, and I will get 0,15*$300=$45?
Is my calculation is good or wrong?