When my nomination comment got a vote too, I guessed it was that.
In terms of an alternative, why did you drop the 'steemtank' tag? I quite like the idea of being able to view a feed of quality development contributions from selected authors? At a guess, it's to improve ease of access. In terms of rewarding contributors over contributions I guess the current system works, potentially you could combine utopian tags and only reward certain categories, but I guess value could be provided in any category. You could go the other way with a no vote tag, which would prevent the vote, but again from a UX experience that isn't perfect.
With all the above said, I guess it's not much of a worry at the moment with the current vision, just being wary of your SP if it was an issue :)