What is Hashnode Team's revenue?

Hello Hashnode dev team & founders,

I noticed that Hashnode remains as free web app to use and no ads are displayed anywhere on the screen until this moment. I wonder how does Hashnode dev team generate revenue to support this awesome community site and also the dev team's cost ? Do you have one or more Venture Capital whom keep investing money to support Hashnode ? Would you like to explain to us how do you support Hashnode to keep alive until this moment ?

Cheers.