I work part-time selling my courses and materials on my subject. To accept payments for the courses and subscriptions to my channel, I connected to Prodamus. The service is very convenient, and the support is responsive. The costs of connecting have paid off since the price also includes an online cash register, which helps avoid extra expenses for renting one. Additionally, my subscribers receive a receipt via email when they purchase a course, so I don't have to deal with that issue.