Meta doesn't really belong in there, not much vertical integration there, it's very horizontal with instagram, whatsapp, facebook, threads (lol!) serving simila

Meta doesn't really belong in there, not much vertical integration there, it's very horizontal with instagram, whatsapp, facebook, threads (lol!) serving similar and sometimes overlapping audiences. They don't really provide a service beyond social media (unless you count the OSS / free software they release for devs)