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Most delegations to bot are about 8-14% APR I think. MB voteselling is 18.2%. Dlease today had a big 21% APR lease.

I found it! Interesting tool. But need an account to delegate to different bots so it can compute(The default account doesn't delegate to many). Seems I can write an article in Chinese when I have time :)
https://www.steemprofit.info/