I recently found this website linked to Steemit that allows you to easily gain followers and more importantly, Steem!
It is called Steem Engine, which allows you to log in with your posting key so you can vote and follow other users in the website.
Homepage: https://www.steemengine.net/
I believe it's beneficial since you are doing it manually anyway. This way provides a visualization of your ROI on voting.
I hope this helps you in the future and with using Steemit.
If you would like to signup under my refferal link, see below;
https://steemengine.net/join?r=2221
What do you think of Steem Engine? Please let me know below