As a developer, I like to get paid, but the issue of monetising something you already gave away for free is more complicated than that and the idea that somebody can build an effective business on something like caddy is probably a tad unrealstic.

There's a long list of free shit that we're building on top of. It's a bit like somebody sticking a cherry ontop of a free cake then trying to charge for it.

This is why a lot of people just go down the consultancy route. I imagine Matt Holt will be better off simply from being the author of a famous project.

Don't get me wrong though, if the project can monetise Caddy, all power to them.