You are so right about bid bot ecosystem actually locking a lot of value. But the way some people are nuking posts with bidbots and are having their conceptions of "over rewarded" is not going to help the ecosystem at all. In a way, if u see, using bidbots locks more value. You send X amount of steem/sbd to bidbot. Bidbot either power up with that or maybe sell it. But the user now gets only 50% of the rewards after post expiry. And even from that 50% is locked in SP. So if someone had 10 steem at hand, they probably just have 3-5 in hand after using bidbot.
Plus we have to realize that most people in crypto are for profits. And when they not get that profit, then they simply sell off their cryptos. You may say that it is good for the ecosystem, but not if there is majority of people like that.

Between, which category would u put this post in: https://steemit.com/gaming/@siddartha/claim-your-free-hero-in-an-upcoming-blockbuster-crypto-game

I certainly didn't use bidbots to milk rewards for it, but to get more eyeballs. It might not necessarily provide direct value to steem, but can bring some traffic via google search etc.