ClickBank is one of the oldest affiliate networks in the world. Operating since 1998. Specialization — digital products: online courses, e-books, training programs, software.
Key features: sellers set their own commissions. Most commonly 50-75% of the product price. Offers with commissions up to 100% do exist.
Registration: free, just needs an email. No moderation — account is created instantly.
Payouts: from $10 for direct card payment. Minimum threshold for PayPal — $1. Weekly payouts.
ClickBank is interesting for those doing content marketing: reviews, articles, email newsletters. There are almost no offers for physical goods — this is a purely digital marketplace.
Pros: low entry barrier, high commissions, no moderation. Cons: many low-quality products, hard to find a good offer.
Official website: https://clickbank.com For a beginner — an excellent start. Register, pick a niche, write reviews. ClickBank handles payments and refunds itself.