We recouped about half the money through PayPal's dispute process. We let the rest go, deciding it wasn't worth trying to squeeze blood from a turnip.
Fast forward to today, the very same company is on the front page of HackerNews:
https://news.ycombinator.com/item?id=8225738
The business' name is Pigeon.ly / fotopigeon.com (when we worked on it it was called pichurz.com / picturgram.com). The owners names are Fredrick Hutson and Alfonzo Brooks.
So, HN, what should we do? We have a signed contract with them which states that the software becomes our property in the event of non-payment. Should we assert ownership of the software? Of their business? Should we sue them? Should we reach out to their investors (Kapor Capital and Base Ventures)? Should we include Kapor Capital and Base Ventures in the suit?
I would really appreciate any advice HN can offer. We will of course rely on our attorney's advice primarily, but I am optimistic that someone here has dealt with a similar situation before.
Thank you for your time!