It's a fair point. I will also add a list of accounts sorted by the most comments made.
I guess that because accounts like this which already have a negative rep, probably aren't interfering with most people's experiences anymore, so aren't being reported as spammers by the community. This software is increasingly using a community average of spammer as its classification definition.
Great!
I think that's exactly what we need and I am stoked to see this increasing in "accuracy" of reflecting that.
The classification score for those "top-ranked" spammers does not feel inaccurate to me to be honest, but calling those the top-spammers is taking the result a bit out of context imho.