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I think you can use the official promotion service? But like I said, I have never used it and I think it might be changing in a future HF too

If you want to promote something it should cost, since bid bot owners don't sell promotion at a cost you can do so by sending part of the beneficiaries to @null or @steem.dao when purchasing votes. (also mention that in the post so people don't miss it when they decide to downvote based on you using bid bots, no guarantees that they won't either way, though)

okay, thanks for the input