Yes, I remember quite distinctly when that happened to GMail as well.
This...looks like a registrar + nameservers, and doesn't seem to really differentiate itself in any compelling way at all. Name serving + registration anywhere else, or at two separate places, isn't that different in price from the price they show in their screenshot.
Invite only for something like this is incredibly lame. I mean, whoever thought they'd pull that tactic again needs to seriously be corralled. It is amateur hour.