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This system means people have to A) Dedicate time and effort into their work B ) Pay for slightly more recognition. It's not exactly upvoting a small group back and forth regardless of content and quality (which is what circle jerking is)

If the concern is that they can somehow abuse this by, say, being friends with the curation leader, then they can just do what OCD already does and limits premium services to one or two times per month.

This is why it's so elegant (in my opinion), because curation teams have already figured out the most elegant ways to curate, all that's needed is less people voting themselves indiscriminately.