Well said, but while there is money to be made...
From what I've seen there should be a limit of spend per bid bot. Say 10 SBD per post, that way it'll be way harder get on the trending page without considerable effort.
We need to keep in mind that unregistered users see this page and it's our first impression to the world. I'd prefer curated content to appear there rather than promoted content.
Perhaps a small tweak to exclude posts using bit bots on the Trending Page would also suffice.