It just crossed 500 paying members. I started it with my wife, but recently the shipping part is no longer done by us two manually, but by a local supermarket. In the beginning it was just an email to some previous customers asking if they might be interested in a club like this. Then a landing page and a HN post. From there it grew through blog mentions and now there is a trickle of organic traffic coming in.
Before this I had some small apps on social networks that made more money, but were much more unstable. While Candy Japan could wither away, I expect the death would be more gradual. I still have some of the older sites / apps which together are still making around $500 / month, which is a nice bonus.
Probably anyone working as a salaried programmer in the US is making a more money than I am currently, but I enjoy the freedom and the thought that there really is no upper limit. If we ever do hit 1000 members I'm planning to have a celebration :-)