I think you are wrong. As the post can push up to trending page, many people will vote it blindly. As a result the value after 7 days will highly higher than $300. Sometimes if you are lucky, you can go to $600 or up.
I have do some research for people who are using shit content and bidbot to earn money. You can check my result here.
The main ROI is come from the people's blindly upvote in trending page. It is non-sense if you ignore it.
Yes, there will be People Upvoting Trending Posts Blindly but those will be just Newbies with very less SteemPower which wouldn't make that significant of a difference.
Plus being in the Trending Page gets you a lot of Eyes even Eyes that would Flag your Post if the Post is not appropriate.
that's true. I got quite a number of flags for this post. i feel like an opposition leader in a country with a strong dictator & his cronies. lollll