I actually used archive.org recently to get money back from a company. I had purchased my spouse a heart-monitoring watch band for her Apple Watch. (The Kardia one that can create an EKG.) At the time I purchased it, there was no wording on their website claiming that you needed a paid account to use the functionality. It was all written as being optional. So after 30 days went by and her device would no longer work for its main purpose, I wrote to the company. Turns out they've updated their web site, so I went to archive.org, made screenshots of what it looked like on the day of my purchase and told them, "you can either give me a full refund or I can do a chargeback." We got an immediate refund and sent the watchband back.
