I think it is a common part of the Internet. People sign up and then lose interest.
The situation is magnified on STEEM in my opinion because of the delay from the time people sign up and get verified. When one has to wait a week or two, the interest is lost for many people.
Add in the fact that many are led here by the promise of making riches instantly which is misleading for most and people get discouraged.
For this reason, I believe we need to tout the idea of lack of censorship, no data mining, and freedom through decentralization.