Earlier quoted context omitted.
I'm guessing market dominance from years of targeted advertising on podcasts as well as buying/bullying mattress reviewer websites to make sure they stay as the highest rated. HN from 2017: https://news.ycombinator.com/item?id=15321807 "Casper went to war with popular mattress review site, then financed its takeover"
so even people who are cash strapped are willing to overpay for a commodity item if they perceive it to be the best in a certain price range...? i guess purchasing behavior is very different for things you buy very infrequently like a mattress? looking at Costco and a highly rated foam comparable to Casper is $500...
There's also so much info on springs, foam, latex, rubber, on and on. It's overwhelming. Casper has good marketing and make it easy, and since it's so hard to compare, they just need to be close to other prices. They don't need to go full walmart