What’s the best way to measure product usage?

Fred Wilson (Co-Founder and Partner at Union Square Ventures)
30/10/10 – AVC

I call this ratio 30/10/10 and so many services that we see exhibit it within a few percentage points here and there. Here’s how it works: 30% of the registered users or number of downloads (if its a mobile app) will use the service each month. 10% of the registered users or number of downloads (if its a mobile app) will use the service each day. The max number of concurrent users of a real-time service will be 10% of the number of daily users.