Someone said it was outright denied in another OLED threadbobohobo2kx wrote: ↑ LG recently started covering burn-in under warranty. So if you use a credit card with extended warranty, you'll basically have 2+ years of burn-in coverage. Costco's TV extended warranty is provided by Asurion. Their terms and agreement excludes burned-in phosphor, but OLED panels don't use phosphor like plasma. So you can argue that OLED burn-in should be covered. Best to confirm with Asurion first though.
edit: it was here, but that post seem to be removed or relocated