I worked for an Education startup a couple of years ago. They had a really good math learning product which blew away the competition in terms of software quality but they didn't achieve exponential growth. It was linear growth but at a very good rate. The trick was to sell directly to schools and educational institutions.

There are new challenges there but it's also very high-reward. You can sell 1000 licenses from a single deal with a school. If you get a government public school contract you could be looking at 100k licenses from a single deal.

I think that companies which do big b2b deals have become greatly undervalued. VCs are so obsessed chasing exponential growth curves that they seem to have forgotten that the earth only has limited population and that buying power has become much more centralized and is becoming increasingly centralized.