ARRL vs. eHam vs. QRZ | The Velocity Factor

I was curious and measured the velocity of the American Radio Relay League (ARRL), eHam, and QRZ websites. Compete [Web2.0] defined velocity as, "Velocity is an effective way to measure the impact of planned (or unplanned) events, such as new advertising campaigns, product/service launches or general site growth. Simply choose an event date as the starting point to see how it has affected a site's attention over time." Time is currency and holding attention is value. Field Day 2008 produced a neglible velocity bump. In contrast, QRZ is effectively holding attention when compared to the ARRL and eHam, overall with Field Day included. The QTH for ham radio operators is QRZ?