The affiliate program for WP Manage Ninja has a decent commission rate of 20%.
With it, you can promote several premium WordPress plugins, including FluentCRM which is a self-hosted email marketing automation plugin for WordPress. It costs $129/year for a single site license. Then there’s the WP Fluent Forms Pro plugin which is $59/year for the cheapest license. This is a form builder plugin. In addition to several other plugins as well.
WP Mange Ninja also sells premium WordPress themes. In total, there are 5 different themes you can promote. This includes a medical theme, a restaurant theme, a multipurpose theme, a theme for education, researcher & professor-related usage, and a WooCommerce & blogging theme for women.