Is Flickr free to use?

Related questions

1. Does Flickr cost money?
2. Can you make money from Flickr?
3. Is Flickr still alive?
4. Can Flickr photos be used commercially?
5. Is Flickr free for commercial use?
6. Are photos on Flickr copyrighted?
7. How do I make my photostream private on Flickr?
8. Is Flickr better than Instagram?
9. Is Flickr secure?
10. Are photos on Flickr private?

Tags

1. #uploaded
2. #protected
3. #flickr
4. #thousands
5. #photo
6. #photos
7. #world
8. #licenses
9. #contains
10. #commons
11. #under
12. #people
13. #creative
14. #sharing
15. #those
16. #website