I gave in voting on my own comments, as a minnow. It doesn't raise them because my voting power isn't strong enough, it doesn't earn me much of anything and my votes are far more valuable in creating good will with people I meet.
Comments say hello, voting with a comment creates in investment in the relationship (makes that person realise you're serious about wanting to get to know them) especially since HF19, at least in my book, and it's a small book in a big pond lol
Cheers :)