Can you name some more types of earning online?

Tweet

There are many earning chances on the web that are available for international online money earner. While there are many sites that provide "paid to ..." chances, they can be classified into a few types. Here are some of them: Get paid to ... 1. click 2. read mails 3. do survey 4. promote (e.g. donkeymails) 5. post links 6. upload (files or video) 7. write 8. discuss 9. sign up 10. search 11. ask other to sign up (i.e. getting referal) 12. social 13. do short tasks (e.g. Mturk, Cloud Crowd, Microworkers) 14. do freelance jobs (e.g. ODesk) Can anybody name any other types of earning online ideas?