Yeah we were doing it anyway to keep our family in the loop about where we were and how it worked. Honestly it's probably way less that $10/hour, but we do it for the travel log anyway.

So if you like to program, programming is passive income?

I don't think that's how it works.

I think stock market is passive income. Literally 5 minutes to set up an account, and it can provide income for life without touching it. I consider that 5 minutes small enough to not count, but not sure what the hard limit is ;)

If you make an iPhone game.. spend 1000 hours.. then it makes you a few $100 per year for a few years, I don't think thats passive income. It is just income that is very delayed from when the work was done for it.