I have a small webcomic that recently got (or really is in the process of getting) a wave of maybe a dozen attempted comment spam posts from the same source over a 24-hour period.
Normally I wouldn't have even taken note of that; I'm used to seeing Wordpress comment spam of every shape, form, and volume, and I have moderation on so they didn't even get posted.
However, they don't fit any pattern I'm used to.
The posts, although they're directed at random pages throughout the site, are all very obviously ~1 paragraph comments copied from a single thread at either a webcomic or fanfiction story, but with one word near the start having the letters jumbled randomly, probably to make it harder to copy and paste a chunk into Google to find other occurrences (a quick look turned up the same "conversation" on some blog with post dates over a year old, and a random memorial with post dates almost three years old).
Every post comes from a completely different IP address, and while most are in China some are from France or the US, so it's probably a botnet. Every post has the expected random-character free email address (gmail, yahoo, outlook.com), and every one has the URL pointed at a different, normal-looking Facebook page.
And that's it.
Essentially a legit-looking chunk of text, a legit-looking URL, mostly-legit-looking IP addresses, almost-legit-looking email addresses, and no spammy content.
So... what's the point? There is literally not a word of advertising in it, and the URLs are equally useless even if they had made it through.
Is it an effort to poison spam filters by getting people to flag spammy content that is indistinguishable from real content? Are they looking for places that these get whitelisted so they use it to detect sites that are going to then let actual spam through from those IP addresses? Some other angle I'm not getting?
I just can't figure out why you'd bother setting up a system to generate spam with no commercial value.