Interesting, I wouldn't have expected that either. I wonder if the "some people get more votes" concern disappears if reframed from "vote for you who approve",

Interesting, I wouldn't have expected that either. I wonder if the "some people get more votes" concern disappears if reframed from "vote for you who approve", to "vote yes or no for each candidate". In a 7-candidate race, it's not that one person casts 1 vote, and another casts 4; both cast 7 votes (1-6 vs 4-3). I suspect we're so conditioned to treating votes as exclusionary/zero-sum, the mere idea of one person ticking multiple boxes can easily trigger instincts for fairness / cheater detection.