5.3 Merge window, part 1

Web hosting veteran here. I worked for a company that added dedicated server hosting to their already-existing shared hosting solution. Their top-of-rack switches were consumer-grade unmanaged switches, and for a while we had customers stealing each others' IP addresses.

I dunno about a "black market" but people sending spam or doing SEO are still willing to beg, borrow, or steal for IPs, given the chance.