Any MemberGate generated page or product on your site can be used for an affiliate to send their referrals.
Their affiliate ID can be apended to the end of the URL to give the affiliate credit for any affiliate sales.
At the end of a url of a page on your site add ?affID=affiliateID where affiliateID is the specific ID of the affiliate.
As an example, let's use an affiliate ID "privatead."
?affID=privatead can be added to the end of the url for a user to visit that page.
Keyword Rich URL