Blade folding kits like Paravion Technology seem to be used where hangar costs are high since you can save hangar space. The military also folds their rotor blades when in storage, especially on vessels where space is limited. I've heard some people say that doing so can lower the TBO over the rotor blade since you are exposing it to movement periodically, I suppose if it's done infrequently it would not make a big difference, but if the blades are being folded every day could that possibly lower the TBO? This seems like an interesting question.
I could see someone making an argument that this places unnecessary wear if done often.