"[...] it was just me programming what was a facebook, really, at that time for Harvard [...] they didn't have anything like that. [...] I realized that because I didn't have people's information like a school would in making a facebook, I had to make it interesting enough..."

I think what he meant was that Harvard itself didn't provide an online facebook to its students. Wasn't Harvard supposedly working on a university-run online facebook during that time? Or am I just thinking of houseSYSTEM?