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For myself it's https://pevo.science
You'll have to check the others yourself. Choose your witnesses carefully, but the power down alone isn't a valid reason for a decision imo.

steemstats.com, steemdb.com, steem.ws and steempress.io are all the projects I'm paying for out of pocket for the most part. My power down of ~50 STEEM a week doesn't even cover my server costs, and I doubt me selling anything has an influence on the market.

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