Hi.
Unless you think I'm going to hunt you down in the middle of the night, you know me in person but secretly hate me, or you work for Mark, I can't think of any reason why asking me a question would require a new throwaway account.
Your question is leading and based on numerous false assumptions.
I offered to sell Harvard a license. From the beginning I wanted to expand the site to other schools. That's why I spent a ton of time making the photo module on the home page (http://housesystem.thinkcomputer.com) modular: so that users could eventually upload their own photos to the photo album of whatever place they were at. I was inspired by the model of the Daily Jolt, which my cousin at Brown showed me during my sophomore year (2002-2003), but I thought it lacked important features. Your assertion about my lacking vision is therefore incorrect, not to mention a little insulting.
I decided not to keep going with houseSYSTEM because I thought I could come up with a better idea than an integrated network for students. And I did. It's an integrated network for businesses, and as beneficial as houseSYSTEM was to the student population, what I'm working on has far more potential when you think about things on a large scale. That requires a bit of vision, don't you think?
I deserve credit because I worked day and night for months to write code for a product called The Facebook that was part of an integrated environment for students, and every feature I created is available in some form on http://www.facebook.com now, which started as an integrated environment for students with similar or identical integration. It's not about inventing social networking at all, and I've never once claimed that.
But as you argue, maybe that's all just as common as building a chair. Even if Mark had never met me, he was influenced by houseSYSTEM. As Harvard tries to teach you from the minute you get there (because it's common sense), it's proper to acknowledge work that has influenced you (as I have in this post, for example). It's improper to plagiarize or make false claims.
It's true, I never had the vision to make Facebook what it is today because I wholeheartedly disagree that what Facebook is today is a good thing. My Facebook would have been far smaller with fewer users, but far better. That's the vision I still have, but I'll have to call it something else when I get around to it.