Calling these "spam payloads" is incorrect. The spam payloads are on Faceboot's servers. These are sites that are linked to by the spam, ostensibly for the purpose of funneling to whatever the spam is trying to market. Trying to police generic web pages, rather than the spam itself, seems like an exercise in futility given the basic philosophy of the Internet.
> And this is how a lot of the early spam fighting worked: by finding hosts that allowed sending spam and publishing their IPs on blocklists
The situation has a similar shape, but there is a distinction as Dreamwidth is not actively sending spam but rather responding to requests from viewers. Still, we can look at the outcome of what happened to the email ecosystem - increased centralization of providers - for a warning of what's to come.