OP here. I want to thank everyone for their comments, contributions and suggestions! The HN community definitely came through on this.

Some general answers:

- An important point that I missed: we offer trial licenses.

- If necessary, we work with the customer to establish payment plans. Apparently it even happened today!

- The crack is being hosted on a site dedicated to cracked software, so I'm not sure if DMCA applies. (I'll have to read up on it.)

I'll take note of those who offered some help in case we'd like to work with you.

(Edit: Fixed comment layout for legibility.)