not sure what the new one is, but i used to use steemnow.com not sure if it switched over or not, and too lazy to look.
and re: users - there are over 1.4mil accounts - again, havent looked at the numbers in a while.
also totally agree with what ure asking, why its not more 'interactive' its cos theres money involved ( same reason the troll is low ) a lot of people dont read the stuff, only post
tbh, i only here replying due to the fact it was on my page after i just posted due to a common tag :P
tbh, do u. search for topics u like, comment on them. u'd be surprised how quickly u get organic growth