There are about 6 pages.dev domains spamming lemmy.world communities
The volume is definitely inorganic, and is across a wide range of communities
pages.dev is Cloudflare's site hosting which can be used for free - there are likely many legitimate sites that use that domain, but the current flood is suspicious
I have no idea about the why, but I've seen the same thing. All new accounts spamming content to all of those (and at least one known-good user posting links there; maybe thought they were legit?). I've banned/removed them all locally on my instance, and I think some other admins are doing similarly.
All of those, if you go to their base URL, seem to be part of the same campaign (spampaign?): The Freedom Project / The Freedom Estate Project
I may just start blanket-banning *.pages.dev for now and deal with any false positives case-by-case.