The camera of your phone can fetch you thousands of dollars.Pictures in your phone are products that can be sold to make money online.
There are websites that are photo stock websites.These are websites where video makers go to for photos and video clips they need when making videos.There are millions of video makers around the world that produce millions of videos each week.
Also authors from various tetiary institutions around the world also use those websites.A picture is sold between 7 and 10 dollars. One picture can be downloaded 10,000 times.In this you are not buying anything or paying for anything. What are those websites and what type of pictures are needed, watch this video for details.

https://www.youtube.com/watch?v=N_ZwOSvTtzU