Pipe bending machines are used to twist and shape the metal tubes into everything from car exhausts to trombones. This pipe cleaner bending robot from Yoshihito Isogawa also works on the same principle. It is more of an exercise to push Lego to its working limits. There will always be someone who will benefit from bending pipes quickly.
There should be one Etsy shop which should be full of pipe cleaner masterpieces. There are also those classy folks who smoke pipes and actually use pipe cleaners for cleaning their pipes.