Black Diamond Distance Carbon FLZ Trekking Poles

I purchased a set of BD Distance Carbon Z trekking poles from MassDrop about 2.5 years ago. They probably have a total of 60 days on them, and the spring-loaded handle buttons have rusted and no longer work. Not abused, not much wet hiking. I should add I still have 6 year old Carbon Corks and they work fine. I contacted BD about the Distance Carbon Z’s, and here was their response: Unfortunately, that item is no longer covered under warranty. We are happy to offer you a discount code you can use to purchase a new one at 40% off.  Code should be entered in the Enter Promo Code box in your shopping cart to see and apply the discount.  Code will only work one time, for one product only. Code does not expire. Code will NOT work on Web Specials, Sale items or other package pricing. You can use this code on our website: So here’s my beef: The buttons shouldn’t have failed on a $160 set of poles…they rusted…what kind of metal did they use? And secondly, I’m kindly directed to their website, where EVERYTHING is on sale (including this exact pole), and I can only apply the discount code to full retail pricing… so….thanks for nothing. Maybe I’m expecting too much but I’m going to switch brands. I thought I would share my experience.