Fox Mahony has been making Final Cut Pro X plugins since December 2011. There are over 150 available online. At the moment he makes some money from his YouTube demo videos – each video description includes a download link:

We offer free access to all of our templates and ask only that you watch (or let run) the entire video that accompanies the download information. That way, Google pays me and you don’t have to!

As well as accepting donations via PayPal at his template site, he has now set up a store at Creative Market.

If you’ve ever downloaded one of his free Final Cut tools, it’s only fair that you visit his new store to see his first commercial template and return often to see what else he offers.