RE: Where should you be promoting yourself and your content? Easy! @dtube!
I remember watching dollarvigilante's video before joining steemit. The video on youtube was titled some thing like this "I made 1500$ on my first post on steemit". This video seriously gives some unrealistic goals to some new comers. Those who come watching videos like these they would basically quit soon after not seeing that kind of earning.
Jerrybanfield also has a similar video too.
Most of the people who are subscribed to them or have joined here after watching their ad instantly follow these people as soon as there password is approved.
As far as others are concerned i hardly came across them. And by the way you are also not far behind. You have some genuine followers and this number will increase soon.
Since your reach is organic and through posting of regular content, that day is not far when you will be among 100 most followed steemians.
I agree with this posts being unrealistic for many - the accounts you mentioned either came with a huge following, and or a huge investment, which brought the Whales to come and see.
I started with no following from elsewhere, and not knowing anyone on Steemit, so I think my case is more similar to the majority of joiners.
Regular content is a key to growth, a bit of luck, and plenty of work too!
Thank you for your kind comments! :)