As of this submission, the issue still hasn't been resolved
Not true. If I read the explanation carefully, what really happened is that some credit card companies sometimes add the CC number to the description of the purchased item. Bad! Which also means that on your printed statement for instance, your full CC number will appear. During beta testing of Blippy, they were not aware of that "feature", so they let through the full CC number of 4 beta testers. Once they figured it out, they easily added a filter.
If you were a beta tester for a service like Blippy, you can't be too shocked that this might happen. A better discussion would be what is Blippy really good for? I can see why I might like to browse other people's purchases once in a while, but why would I want to broadcast mine?
better than an internship in a startup: become a founder!