I find this concerning (DBO)

by Beorn , <End of Failed Timeline>, Tuesday, August 15, 2017, 20:05 (2663 days ago) @ INSANEdrive

How the hell did this get through the filter? If spam robots were to try and take over, I'm sure this is exactly the sort of thing that they'd post.

But yes, spam detection is done through a third-party service, and a couple of the major things that seem to snag people are 1) lots of links in a post, and 2) posting while connected to a VPN service. I think this is because real spammers tend to use VPN services to cover their tracks, with a byproduct being that large swaths of IP blocks end up blacklisted.