ConvertKit
Commission: 30% recurring
Cookie window: 30 days
A new up-and-comer in the email marketing field, ConvertKit helps its customers grow their customer-base via landing pages, forms, and email drip campaigns. (You can learn more about ConvertKit by reading reviews.)
ConvertKit's affiliate program is primarily addressed to existing ConvertKit users who feel their audience could benefit from email marketing products. The program offers a lifelong 30% commission for every referred paying customer or webinar subscriber.
With plans ranging anywhere from $29 per month all the way to $2,000+, the income potential is a very attractive offer, and it costs you absolutely nothing to join the program. The program does not, however, offer any special deals or discounts for any product the affiliate might promote.