I'd love to see a write-up of this if you ever get the chance.

There really isn't too much more to it but happy to try and answer any specific questions. I wasn't involved in the business dealings at all so I have no clue why it happened. System was originally written in PHP and I later rewrote it in Erlang as we got more sources so I could contact all the networks for ads at the same time. It was a very lightweight system the click handler was the heavier one.