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In the Marketplace products are ranked by their "productivity score". To preserve the integrity of the system we do not publish the formula for the score, or the score itself, but we can say that it is a function of these four factors:

• $Earned/Sale
• %Earned/Sale
• %Referred
• Gravity
 

Every product listed in the ClickBank Marketplace is associated with a sales commission rate. Commission percentages range from 1% to 75%.

$Earned/Sale: Average net amount earned per affiliate per referred sale. Note that this is the net earned per actual sale, and so it is impacted by refunds, chargebacks, and sales taxes.

%Earned/Sale: Average percentage commission earned per affiliate per referred sale. This number should only vary if the publisher has changed their payout percentage over time.

%Referred: Fraction of publisher's total sales that are referred by affiliates.

Gravity: Number of distinct affiliates who earned a commission by referring a paying customer to the publisher's products. This is a weighted sum and not an actual total. For each affiliate paid in the last 8 weeks we add an amount between 0.1 and 1.0 to the total. The more recent the last referral, the higher the value added.