Can its popularity really be attributed to that? I'm guessing that when it was reserved for Ivy League students, it has <50,000 users. When did they break a mil

Can its popularity really be attributed to that? I'm guessing that when it was reserved for Ivy League students, it has <50,000 users. When did they break a million? I'd also be very interested to see the actual metrics of growth, with milestone marks for new features. I'm going to guess that FB isn't too keen in releasing this data, though.