When LL Bean ended their lifetime return policy, their CEO wrote this:

> Increasingly, a small, but growing number of customers has been interpreting our guarantee well beyond its original intent. Some view it as a lifetime product replacement program, expecting refunds for heavily worn products used over many years. Others seek refunds for products that have been purchased through third parties, such as at yard sales.

People were buying old items on eBay and returning them to the store to get a brand new item.

Bad faith actors ruin everything good eventually. From small things like return policies for retail chains, to the political process of an entire country.

I think that's increasingly true. A lot of people want to game the system and you mostly don't want to place the burden of what's reasonable on a low-paid customer service worker. So you set reasonable and (mostly firm) time limits and let the processes take their course. Should be some wiggle room of course. But it's not reasonable to offer lifetime replacements unless people are willing to pay the 2x to 3x prices that implies--which very few will.