How else would the average person try the iOS beta? The yearly license, user agreement and 48-72 hour wait is enough to deter anyone.
Also doing instant registrations - brutisboot AT gmail DOT com
As a developer, Beta software is under NDA and not for distribution by anyone other than the publisher. Even though I could get the beta from my dev team, I'm not taking it. Why? It's beta and I'm not taking chances with equipment that I need to have operational. I'll wait.
But... back to point 1... I'm sure Apple would not be happy people are selling access to iOS 5 beta's. It's not cool.