That's a standard message that is not specific. There is a lot of spam lately and the detector seems to do a lot of false positives.
Unfortunately, the Itch staff that would unblock those comments is obviously overwhelmed with all the blocked comments. I think the developer can also unblock specific comments. At least there is a pending section where such comments are listed.
(The moderators in that message are not the blue moderators you see in the general message boards. It is either Itch staff or for those threaded comment sections this is handled by the developer)