Agree with others that this is not an entirely unusual practice, and not to expect a discount. Also agree that it’s worth asking your farrier – in a non-accusatory way.
If a horse isn’t wearing a shoe enough to toss it, I don’t see the problem in resetting. If anything, this upcycling reduces waste which I am all for, I have often wondered how wasteful the shoeing industry is. What happens to all those worn shoes? Horses go through so many.
I could see a stalled horse not wearing his shoes too much and I could see in certain circumstances, resetting a second time. I’ve never had one get reset twice (reset once does happen a few times a year), but my horses are out 24/7 and on rocky substrate. Some cycles my shod horse wears the plates thin enough that it’s a study in steel’s resiliency as it hasn’t snapped – other cycles he gets reset. It really depends on the season. I notice he’s more likely to get reset in the winter, probably because snow blankets the rough ground.
Consider keeping the shoes after they’re pulled for a few cycles. I started doing this, and it really is fascinating how they wear down the shoes. That wear tells a story if you are curious enough to look into it. I noticed consistent wear on the RH; I was worried it came from an old injury. Vet came out for a baseline soundness exam and didn’t see anything, but he thought it was funny I trotted out 4 months worth of shoes for him to look over. I figured it out one morning by pure chance. It’s because my gelding’s favorite spot in the pasture is where it first gets sunny in the morning. He will stand there snoozing, always facing the sun, occasionally kicking because of flies. It just so happens his favorite spot has a strip of exposed ledge that his RH strikes when he kicks at flies.