In this case, it was a manual removal by the Hubski team because our auto-detection methods for comments is not the same as posts. We let the community handle all post spam.
Besides the fact that we would prefer to do no moderation at all, it's a major hassle for us remove them. It's not like I have a delete button by all the posts and comments—my hubski looks exactly like yours.
We really only remove comment spam when it literally cannot be construed as anything but spam. The ones I have removed previously have all been done by bots with HTML markup in them, advertising Canadian pharmacies, etc.
cc: thenewgreen mk