That sounds pretty authoritarian. Downvote them if you want, but it might be very unwise to do. They can just add you to a blacklist and you'll never be able to use their services. I believe after HF21, everyone will be forced to use their services in order to get over the new 20 STEEM threshold wall. Any posts below 20 STEEM in value are going to get hit with a penalty against the rewards.

So, yeah, HF21 just made bidbots a lot more essential if you ask me.