20 years from now. You are befriended on Facebook++ by a person who looks somewhat like all the previous girlfriends you have had. Initiating a 3-D video chat, she seems very friendly and has a lot of the same interests as you do. Every now and then -- so infrequently that you do not notice -- she mentions a particular brand or commercial product, always providing a link. Other than that, she's just a great friend. Always there to provide advice, always willing to cheer you up, always enjoying your jokes and stories. Heck, maybe she's even willing to help you out with your startup, providing introductions to her friends and helping you with your marketing. Maybe she helps locate your next big client. Great stuff, eh?
Except she doesn't exist.