How does Hashnode generate its revenue?

I am pretty new to how the finances work in startups or you can say anywhere. Pardon me if you found it to be an aimless question.

I have attended few meetups where Hashnode was a proud sponsor. I have used hashnode before but after going to those meetups I have started to use on a regular basis.

What I didn't understand was how does Hashnode generate revenue?

Because, you don't show any ads(as of now). And rarely, I have seen one of digital ocean though.

How do your business partners or investors see the future of Hashnode?

Hope Fazle or sandeep could answer this. Couldn't tag you directly as it was getting stuck when I choose a person to mention.