I'm pretty sure it was actually LG?
In February Samsung agreed to stop collecting the data when opted out in the US after a few lawsuits were lining up. LG was the target of a different lawsuit in Texas which they settled and then wrote up a forced arbitration clause and doubled-down on data collection, even when opted out.
Don't buy LG TVs.
Oh don't worry, shitty WebOS is enough to put me off that (I unfortunately own one). However in this case we were talking specifically about that recent study of the effects of opt-outs, and for LG TVs the opt-out did result in the no longer detecting any tracking.
Yep, lg. After all, they believe that own your living room and their actions reflect this.