So true!  They can also be used for ammo belts in 1/48th or 1/72nd scale, depending on the size of the cable ties.  We use them in the theater I belong to, to dress stage light cords (ie, to tie them up out of the line of sight).  When we strike the lights after a show, I collect a bunch of the spent ties.

An example of their application:  in Monogram's 1/48 B-17 or B-24, you can use a piece for the ammo feed chutes in the waist compartment.  Or they can be used as the chutes in the wings for a P-51, P-47, or F4F and F6F.

Let's repeat the scratchbuilder's motto:  "Never throw anything out!"