>>5671864 lb anon suggests crosschecking locations with Facebook sites for nearby PayPal and other tech offices.

likely to be on to something. affiliate ad networks and other shady Kat's (think krasenstein types into bizops) do a lot of business using fb and good as platforms for ads, and often set up merchant accounts that accept PayPal on user end, and payment processors (discover network, visa, MasterCard, etc…) on the back in for delivery of payment (whether pay per click or pay per action or other model).