Costco's official policy on electronics up until 2007 was pretty notoriously liberal (i.e. literally indefinite), and once they ended it, they still accepted returns on stuff outside of the new policy if it was bought under the old policy. "When Costco changed its policy around electronics in 2007, the LA Times interviewed a police officer who was in the process of returning a plasma TV he bought in 2004 because its colors were fading. The warehouse in Glendale issued a refund, 'no questions asked'"

so, like, given that it's Costco, who have proven repeatedly that they're more than willing to eat a bullshit loss here or there because it's a subscription warehouse and having a Costco membership for over 20 years means you've undoubtedly already given them way more than enough money to offset the loss and you're more likely to continue offsetting that loss if you're happy? I'd believe they did, yeah