edit:
While I don't know anything about this app since I use 1Password, I'd say it's a pretty good indication the dev is not trying to rip anyone off if they're keeping up with posts in forums across the web, registering and responding to users even here within a 2 hour time frame.
Yes, very good point Bob. I have done dealing with Stack Social in the past, and have had some awesome bundles through them. When it comes to a App, and its description, I can vouch that no-one is trying to rip anyone off.
That site gets a incredible amount of traffic and at times, they have hard trouble keeping up with the coupons they get from the Developers, and the amount of traffic they receive, which is evident in the comments below the bundle.
If at all anyone had trouble, its just a matter of emailing the Stack Social people and they will have it fixed pretty quick.
For Example, I bought Scrivener from them only 4 days ago for $20, and by the time my payment went through, they had run out of coupons and had a Sold Out sign up. A quick email to them, and them answering the comments section, they emailed the new Coupon Codes out within 10 minutes of me contacting them . . .
No need to yell at Mac-Forums for something out of their control