1. Freelance platforms (e.g. Upwork, Fiverr)
2. Affiliate marketing websites (e.g. Amazon Affiliates)
3. Online marketplaces (e.g. Etsy, eBay)
4. Dropshipping websites (e.g. Shopify, AliExpress)
5. Online tutoring platforms (e.g. Tutor.com)
6. Sell digital products (e.g. e-books, courses)
7. PTC (Paid-to-click) websites (e.g. ClixSense)
8. Online survey websites (e.g. Survey Junkie)
9. Micro job websites (e.g. Amazon Mechanical Turk)
10. Offer services (e.g. graphic design, writing) on websites like PeoplePerHour.

Note: Results may vary and depend on various factors like effort, time, niche, etc.