Interaction is quite important in order to build up audience, I totally agree with you. However, I believe there are still a lot of hiccups to account creation which can be a major stumbling block to bringing more people on the platform. Even the steeminvite option often times doesn't work without hitches.

I have a Twitter account of about seven thousand followers and I have been sharing some of my contents with my followers, only a few have been able to set up account out of which very few stayed on the platform. There is a lot of work still to be done in retaining users on the platform, hopefully the next hardfork will do something positive in that aspect.