Because when you're bootstrapped and can't buy a 3 letter dotCom for $55/year, FM doesn't look so bad. So we're working with it, and kind of playing with the slogan "broadcast lit".
Not dismissing your product here, as a journalism nerd I think it's a novel concept and approach.
pen.com is going to fet a pretty penny, I imagine in the higher 10,000s if not more. With funding, it becomes feasible. And to correct myself, FM domains cost $79/year not 55, so that's where I am. Got lucky in finding the short name.