How does codeforces make money?

Revision en1, by interestingLSY, 2017-08-03 11:33:14

Codeforces is a popular online judge and I think it needs a lot of money to keep it running.However,I don't see any ads on Codeforces , so how does Codeforces make money?

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en2 English interestingLSY 2017-08-03 11:47:59 19
en1 English interestingLSY 2017-08-03 11:33:14 201 Initial revision (published)