I really don't like services that are invite only. Just let me sign up and give you my money. It took them about a year to send me an invitation. Of course I lost interest in the meantime.
Gmail was invite only at one point. I remember when everyone was clamoring for an invite. I wonder if it would’ve had the same success without that hype.
You don't need to generate hype when your product is that good. Same as you don't need to generate power for an electric car powered by an antimatter generator.