Solid points above. I'd add that anything established users can do to help newer users like myself to progress into an engaging community here on the platform is going to help retention and also probably incentivize those users organically. That's at least how I've approached it.
I'd say that I have been lucky to advance in terms of reputation fairly quickly via photography and travel posts. However, getting deeper into the media and technology topics here makes me feel like I should develop more depth for them so they take significantly more effort.
With that said, I've used a paid vote service once and didn't really find it to be a great advantage. There are probably others or better producers but I'm not sure I want to have those accounts associated with mine.
Still learning here. Thanks for sharing these ideas though. It's really useful for me to get perspective from users that have been watching the platform and token ecosystem develop for a while.