No price listed. I usually don't sign up to anything unless the price is listed.
I can't really see any small time indie (I could be very wrong I've looked at your project a total of 5 minutes tops) using this. 20/30 dollars seems really low if you're only going to get a small amount of customers.
I'd read up on this thread posted here on HN just a few days ago, there's an incredible amount of info here:
I hate when i start to use a service and then the pricing is not even affordable or can be replaced by something a lot cheaper or even free (open source).