[sorisos]

could also be a niche market product created a decade ago that some other large company depends on. money keeps rolling in with little effort. source: personal experience. the company is no longer in operation but it lasted for a god 30 years.

[kazen44]

another example is a company which is highly specialised in making a certain thing. (for instance some kind of widget for a specific kind of industrial machine). usually demand is stable enough to keep the company healthy for a long time, but scale up is not necessary because the demand isn't there.