Rewards.
A system of rewarding users for completed "deals" (installing apps, subscribing to sites, or even trial subscriptions to various services). Usually the rewards are gift cards from popular stores, which is very popular with a large number of people. One of the main advantages for an affiliate is the huge earnings per click.
Paid Surveys.
Similar to Rewards, but the "deals" here are surveys, and instead of gift cards the user can earn real money, usually around $500. This amount is possible because users answer personal questions, providing information about themselves that is easy to monetize. For example, if the user has a car, he can be sold car insurance, etc.
Jobs.
Ask yourself, how many people would like to work for Apple, Amazon, Tesla, etc.? A LOT! These people are your target. By posting job offers from a specific employer or specific categories such as customer support, work at home, etc., you are meeting demand. Users sign up and move up the funnel, and you get paid for each lead.