Leupold didn’t offer me a free replacement when mine dimmed, but did offer me a 50% discount. I can’t justify buying a new rangefinder every 3 years, though, even if it’s half off. I wish that Leupold at least offered a refurbishment service, as I would have kept it.
I ended up getting a Sig because I found a good sale on them at the time. Not the lifetime warranty of a Vortex, but a better warranty period than Leupold.