Never did get a reply but I've worked it out. It's someone using software to replace specific phrases in existing news articles so that they are no longer an exact match.
They're close paraphrases but sometimes the meaning is changed. Reddit used to have bots that did this to avoid detection when reposting comments.
Had to ban the person anyway for breaking sub rules, but I think we should probably treat "infoterkiniviral" as blog spam.