Hmm… I might be missing something, but the research that you linked above does not actually seem to show general trends across the web.
It seems to be focused on displaying traffic to a site in a way that makes spotting and quantifying… questionable… traffic a fairly simple visual exercise, which seems interesting in itself. However, there is no indication of what sites were represented, nor even what types of site. It’s hard to evaluate whether the instances shown are representative of the web as a whole.
Note: I’m not questioning whether Bot traffic is huge in general, nor whether there are a lot of “bad” bots… but the (googleable) statistics seem to have a bit of a spread from the search result that you screenshot.
What might be more useful would be a statistical analysis of what kinds of sites tend to be aggressively targeted by what type of bots. (I’d expect, for example, that FaceBook and similar platforms attract a disproportionately large amount of attention from a certain segment of these bots. Another segment probably goes after ad-heavy sites pretty exclusively.)