The bidbots bring in more investors into the steemit ecosystem as more people can buy large amount of steem and power it up. Check the largest power-up for last month, 60% were vote sellers which is a good thing for steem.
The more steem that is locked up, the scarce steem becomes and the high the value when the demand for it comes. I don't see anything wrong with selling my vote.
Is this a good thing though? Doesn't this just confirm the argument that Steemit is just a ponzi scheme?
i.e.
Investors come to Steemit be investors and simply recoup their investment by selling it to others at a markup.
vs
Content creators coming to create content, engage with others and invest in the community.
I don't think it is an either-or scenario, but if Steemit leans to far towards investment/speculation/ponzi then the platform will crash once the market crashes and the investors leave.