Just because you can't find one that doesn't fit inside a particular fixture, doesn't mean they're useless in every application.
I've just had the feeling however from some of your previous posts that you were unaware of the varying bulb sizes of CFLs, however. In contrast to incandescent bulbs which are the same size emitting different light outputs on a standard size bulb, CFLs are of various sizes, and some as manufactured are too long to fit in certain fixtures because of the size of the bulb itself.