I don’t know, but I’ve got a couple of theories. One, the company would only ever post them on days that are critically short. Those are the types of days that lend themselves to GS opportunities so senior pilots would never pick them up knowing they can land a GS, and junior pilots are probably already working that weekend or holiday anyways. Anyone else who picked something up would probably be used. If you want to work and things are super short staffed you could probably YS a trip on your X days anyways. Plus a pilot picking up a single day of RES by itself really is almost no use to the company. It’d really only help if the extra day (or days) was tagged onto the front or back of an existing reserve block.