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Rare in which ways? My sense is that there are a lot of things going on where someone was successful, noticed they didn't have good ways to scale up, and stopped scaling up. It's just that these things generally won't be the biggest things around, for the obvious reason.
Rare in which ways?
First, this is all IMHO and I'm not immersed in the charity world, so my views might well be mistaken.
It seems to me that most charities fall into one of two categories. I'll call them "hungry" and "satiated".
Satiated charities have a stable source of income and are generally content to continue to do what they are doing now. They don't put much, if any, effort into expanding and marketing. Such charities are usually small and focused around one or two key people.
Hungry charities are further divided into two subca...