Okay so maybe I'm just a dum-dum, but did the article not actually say what the whole thing they're talking about actually is?
To me it read as "Walmart was already tracking your app and website usage but NOW THEY'RE SELLING IT!" which... I mean I assumed anyone that uses their app and website was having their data harvested just like every other multi billion dollar corporation does... Walmart just decided to slap a new name on it.
By all means, please correct me because I feel like I missed a paragraph.