A person providing a deb with a category that is not user/ requires the person installing (trying to, anyway) the program from said deb to go into red-pill mode.

But, in all honesty: Only allowing debs to be installed in red-pill mode in Fremantle's Application Manager will almost certainly mean an increase in the usage of it.

Another situation where it may be used is when a package maintainer has updated a "data" package that an application uses but the maintainer has given this data package a non-user section because it would "clutter" the "Browse available appications" view otherwise.