Yeah, I came to write something similar. With a 34% discount, then a >50% commission he's selling for 1/3 of his usual price, and like Patrick says, this is further reduced by support costs from, well, cheap customers. It is like Groupon, but most Groupon successes make money from full priced add-ons, and I don't see that here.
A $100+ CPA is also a great way to think about it. I think you could get some decent affiliate traffic (which is what this is, really) for half that.
Side note: I visited App Sumo's site as a non member and there's nothing to tell me what the site is, or why I should sign up, other than it's a "store for entrepreneurs." Presumably they expect you to Google what it is, or perhaps more likely, arrive having already been explained elsewhere what it is and decided you want in. But it seems strange they wouldn't want more control over the message. I'm assuming this works for them, but I'm not sure why.
A $100+ CPA is also a great way to think about it. I think you could get some decent affiliate traffic (which is what this is, really) for half that.
Side note: I visited App Sumo's site as a non member and there's nothing to tell me what the site is, or why I should sign up, other than it's a "store for entrepreneurs." Presumably they expect you to Google what it is, or perhaps more likely, arrive having already been explained elsewhere what it is and decided you want in. But it seems strange they wouldn't want more control over the message. I'm assuming this works for them, but I'm not sure why.