so we got a pretty good R&D question going here, 'do taller than normal springs accelerate strut wear by extending them too much on a day 2 day basis?"
hrmmm, I wouln't think so...weight of car compresses springs at all times, except when it's airborne. so yeh maybe there is extra stress from full rebound when the car gets light over bumps/crests/yumps, but really how much would that hurt? it's the landings, not the flight time that pooch out shockers.
the valves in a shock only work when the gas/liquid inside the shock body is being moved back n forth by motion of car going over the road -- when at rest/parked/upside down nothing is moving so how does that hurt the mechanism???