Thank you @yabapmatt for your comment. Yes, I agree that returns is not the only point to consider and that's why I got started with only 50% returns so the other 50% could be used to finance projects on Steem. I liked that option better. That's also why I delegate to other communities.
This case study is not intended to say which bot people should delegate to according to how they are set-up, with spam lists or not, but to show the facts with data collected on the same days for all.
This encourages comments like yours to explain that there are other factors as well to consider when delegating or using bots.
Thank you for mentioning the new site, which I will look at.