I want to give you a couple of quick pointers to past discussions on Hashnode.
To answer your question on "using" Hashnode; here is a great discussion where awesome Hashnoders like yourself, have great responses on how they get value out of Hashnode, and great pieces of advice on how you should too.
And as for the founders’ vision; you can visit this discussion where Sandeep, and Fazle talk about their motivation behind Hashnode, and the path it's headed on.