Wow. When I first saw it, I thought "huh? Isn't this just a mailing list? Is this an actual product?" Then I did a quick search for "setting up a mailing list"

Wow. When I first saw it, I thought "huh? Isn't this just a mailing list? Is this an actual product?" Then I did a quick search for "setting up a mailing list" ... and I got Google Groups (not the same), a bunch of address book hacks for Outlook and then GNU Mailman. They found a really good market with something really obvious. I don't understand the pricing though. Why just a one-time fee? Why a limit of 50 people and no other pricing plans? Why no custom domains?