What is the difference between the Starter and Pro plans?
The difference between the plans is in the features and auto-pay fees.
The Starter plan is restricted to 1 affiliate group, a maximum of 10 affiliates, and 1 referral link per affiliate. The Pro plan has no restrictions, which enables you to have unlimited affiliates, groups, and referral links.
The Starter plan supports standard referral links with random IDs, which is sufficient for most basic affiliate programs. A standard link will look like this: www.youstore.com/r?id=ie3ejs. The $39/mo Pro plan lets you create "custom links". With these links, you can replace the random ID with a text of your choice, so you can have links like this: www.yourstore.com/yourname.
The $39/mo Pro plan also lets you generate unique discount codes for your affiliates, that they can use to generate referrals. This means affiliates can share a discount code with their followers and if that code is used at checkout, the customer will get a discount, and the affiliate will get a commission.
In addition, the $39/mo Pro plan also enables you to set Product specific commissions, and Permanent customer connections.