I heard somewhere before that often these simplistic logo changes are due to how they look on thumbnails, mobile devices etc. Unsure of the evidence there but it made sense to me. I still hate it though.
Generally it's not much savings if any to do more than 1 spot color instead of full process cmyk. It might even be more expensive since it's a new setup for the printer. Given the volumes they're printing at it's probably basically a wash.