I think it's pretty unlikely that Facebook missed dozens of game changing monetization methods. They've got very smart people working there, and even if all Facebook execs had zero business sense, their VCs have plenty of access to people with that kind of experience.
Also, Valleywag is not a very reliable news source.
EDIT: Toned down my post, sorry I was being obnoxious.
i've been covering Facebook as a major wheelhouse for years, and I've noticed at least a dozen I could name if pressed. That means there's probably a lot more I haven't thought of.
Valleywag isn't exactly the best hard news source, but when it comes to corporate culture type stuff, which is what i'm referring to, they're generally not bad, particularly in their hey-day when Boutin, Owen and the rest of the gang were still there.
Also, Valleywag is not a very reliable news source.
EDIT: Toned down my post, sorry I was being obnoxious.