> Maybe Amazon email addresses

Even if a user registered with an Amazon email address, what does that prove? That an Amazon employee used Angie's List?

As justboxing mentioned, it's completely possible that it was used by Amazon employees for personal use.

> CC's belonging to employees of Amazon

I want to say that's really unlikely. That would mean that there's a database of credit card numbers associated with their owner's employer, which would be troubling on multiple levels.

That's why civil discovery is a thing.

Maybe so. But then there's a difference between a reasonable suspicion and a fishing expedition against a competitor. Will be interesting to see how this pans out.

> I want to say that's really unlikely. That would mean that there's a database of credit card numbers associated with their owner's employer, which would be troubling on multiple levels.

Sounds like something Acxiom (http://www.acxiom.com/) would likely have.

Would it be possible to JOIN a LinkedIn scrape against a day's ledger of receipts, or sign up log?