The affiliate member # can be found on this page here:
If you try to access this page and can not get through it means you do not have a re-seller license.
a Reseller license is required for an affiliate / member ID to be assigned to your account, if you do not have one you will not see this.
You could have an account with just access to the products and that will give u access to the videos, but to promote leaderboard affiliate you need a reseller license which you can purchase as soon as you log in, you'll see a big red message that shows "activate your reseller license here.
To log into your account click here: