This is getting off-topic for the list, but ...
> > Do the `people in the LaTeX 3 project' get paid directly for their
> > work?
> They get the occasional air fair paid so we get to see each other a
> couple of times a year. And very occasionally help with equipment
> LaTeX support is a hobby.
I suspect that most people (like me) who find themselves in a position
where people yell for help about solving some LaTeX problem, also do it
as a hobby - or, at least, like me, do it for love rather than money.