Should be old figures. That was quite early figures for use in mobile phones and similar.

And one issue with "1000 hours" was that red, green and blue starts to deviate in intensity. But this can also be corrected. It's quite common for quite a number of other technologies to have very quick ageing the first hours.

Some monitors will lose 10-20% intensity within the first days, so quickly show burn-in patterns. It's just that the ageing is so fast in the beginning but then slows down. So a smart seller makes sure to burn in with all white for one or two days before shipping.

There exists OLED panels with claims of 400k hours to half intensity for worst color. And there exists solutions with feedback loops to adjust the different colors to make sure they keep the color balance between channels. If not accepting 50% intensity loss after 400k hours? Define the panel as a dimmer panel that isn't running at 100% intensity from scratch. Then it will be able to manage quite a number of hours while still stay at rated intensity while the electronics slowly steps up the intensity.