Ask HN: Feedspot using leaked Adobe Email Addresses?

I just received an invitation to beta test the "new" Feedspot Google Reader replacement, however, the email address they used to contact me was one that I explicitly used only for an Adobe account (using GMails custom addresses / aliases) and the address was part of the leaked password / email address database from Adobe.

The question is two-fold: First, is it OK to mine these kind of sources and second, can somebody confirm the same kind of emails?