It's the nature of the tech. There is no way they can include that under warranty just because there are no limits to the kind of damage people would cause by abusing their displays. No different to Plasma really.
Its no different in terms of warranty for LCDs either, if you read store or manufacturer warranties before the days of OLEDs burn in isn't covered even if its on an LCD. It's also miraculous that Samsung only start offering their burn in warranty when they know they are competing with OLED.
I have nothing against Samsung, but its clear they are fighting against OLED and that warranty is just part of the battle.
Yes they are. Anyone been to Curry's/John Lewis lately? Samsung are spending an awful lot on fancy premium retail displays with QLED plastered all over the place, having their own reps in store. I also observe that in all locations where such premium displays are placed, the OLEDs are not on the same wall/aisle so you can't compare a QLED to an OLED side by side.
Warranties: It's marketing that says or rather implies to, Joe 'pop into Curry's' Bloggs; Look a warranty, our QLEDs don't get IR. When of course a warranty doesn't say that at all.
Of course these warranties are new, so claims will be minimal to non existent at the moment. This means no one really knows whether the warranties will be honoured true to spirit or, how much small print allows any manufacturer offering IR guarantees to wriggle out of paying out. We will have to see if they are worth the paper they are written on.
I recall all this a decade ago, with the scaremongering about plasmas; fading, IR all the blurb targeted currently at OLED. Turned out the majority of the 'Don't buy a plasma, it will be a washed out faded, image retention mess within 2 years info', was the result of deliberately biased test conditions and outright propaganda by, drum roll please, LCD manufacturers.
Had my plasma for almost 9 years- when it was watched by two teenagers who had MTV on for hours at a time back when it had a fixed logo. never had any image retention, and it only show slight colour fading in it's last months with us. This plasma didn't have screen cleaning programes or even the timed turn off protection- it often got left on BBC news or MTv for 8 hours because someone dozed off in front of the telly!
I have an OLED now-bothered more by DSE, haloing, limited viewing angles (VA panels) and the lack of picture depth in LCDs than IR but then, I don't game, nor use my OLED as a PC monitor so.