Maybe I err - but my point of view on Bid-Bots:

As far as I know from beginning of Steemit.com in 2016 far over 90 percent of the Steemtokens were/are in the hands of the developer and some early birds.

So using Bid-Bots serves smart and active people on Steemit because it enhances the redistribution of the tokens. 

Many bots also set certain quality standarts, so they can't be used on scam and spam.

You may say, bid-bots also enhance the inflation of tokens and hurt the Steemprice.

Well, that is true to some extend, but please bear in mind, that there is also the possibillity to destroy Steemtokens and taking them out of the system by transferring them to @null.

So I guess Steemit is a very clever thing :-)

The cumulation of most of Steemtokens in the hand of a few people also gurantees the quality standarts and longlivity of Steemit if they handle their property well.

Bidbots make it possible to gain more visibility and also more income on your post.

I guess it is with bid-bots like with everything in life: Use it but do not abuse it.

As long as they are tolerated by the developers, it is just clever to use them to build up  a good Steempower and a strong account.

As there are various bots for all ranges of SBD even newbies can make profit as there are some already starting at 0.001 SBD and so you can grow a strong account out of nothing with just work and time.

I wish you all the best :-)