I am not sure what you are talking about.
Are you talking about comments or are you talking about fake projects?
Is there a new wave of spam comments? There has been a huge wave a while ago. And some developers back then were closing their comment sections because they had so much fake comments. Since then Itch made the spam filter super aggressive and after that the complaint threads shifted from developers complaing about the spam to users complaining to not be able to comment for weeks.
There is like four ways Itch gets abused by criminals. Possibly more.
Fake projects with malware or the rare piracy attempt.
Fake blog postings leading to malware.
Comments botted on games.
Comments in public message board (usually scams, not malware.)