For v11 at least, I think all I'm going to do is just include a link to perform an IP lookup directly on their site (from investigate user). Their site gives a lot of useful information which I'm unsure is included in the API itself.

Marking as sponsorship. While I'm planning to do the above comment (simple link to the site), if anyone wants deeper API integration of scamalytics, they should sponsor this issue.

Given this is a commercial service, I'd only really want to see it integrated as a non-bundled addon (aforementioned simple link is okay). Possibly new hook(s) would need implementing to allow that kind of thing to work.