@Tom Gasville... it seems in this case, the site wp-abtesting.com was safe ...

From what we can tell/see, the WP-ABTesting site itself was not doing whatever is was that got Google's attention ... but they were linked-in or networked with others, who were & did.

It's worth noting, especially for the less-technical and for those who think they need networked services to run a web-business (or to be cool), that being linked-together can make multiple web-entities functionally a single site. When a problem arise with one member of such a network, no matter how inconsequential they might seem, what's going on with them can affect (ie, eg, 'take down') the whole network. Being more independent may seem old-fashioned, but it's the stronger & smarter security-posture.

I don’t see the point about second interpretations ... It seems to be solved now. End of story.

On the contrary, Mr. Gasville, we have a Comment section as this, precisely & expressly to invite & explore "second interpretations".

Theme Forest, and parent company Envato, have been the topic of controversy within the WordPress community, for some while now.