Oh, I forgot c), which is usually just a raw, unadorned "I'd like to add you to my professional network." from random recruiter scum. Kinda of a b) really, but

Oh, I forgot c), which is usually just a raw, unadorned "I'd like to add you to my professional network." from random recruiter scum. Kinda of a b) really, but without the work of having to have a position available...