Muse's utility has significantly dropped with the blockages.
To become truly useful again they will need to use residential proxies, but I can't see them use those due to the risks and reputational damage.
One thing with Muse though is that you can scrape Meta's own sites which are currently all going under login walls and restricting discovery/search entirely.
Spamhaus is nearly thirty years old and the notion of electronic distribution of IP and domain "reputation" lists is at least that old.
I'll bet my hat that the Internet "advertising" [0] industry has been calculating and determining the reputation of individual households (if not individual users) for at least a decade.
[0] The scare quotes are because its primary purpose these days is for dragnet private-sector surveillance.
Good one, I can't stop laughing. Thanks!