Makes perfect sense from their perspective to push this extension because it's similar to .com and your average joe on the street can no longer register the .com he wants.
So he tries another .com he thought of. And another.. no luck. Closes his browser and forgets about his dream of collecting Internet riches and GoDaddy miss out on all that sweet profit they gain when they upsell all their shitty products in the registration process.
For GoDaddy and people like that, it represents a total gold rush all over again. But you guys are a bunch of negative nancies who can't see the upside on anything if it won't rank. They're banking on .co and you're not. Is that the issue?