I don't. I didn't read the article, I was bored and I thought parent was being sarcastic saying "building a profitable business on the backs of people willing to be tracked". Missing the key word "willing", I assumed it to be the same business model of just about every internet company and Foursquare was just now figuring this out. So I broke the rules and responded sarcastically thinking this post wasn't going to get much attention anyway (it's about Foursquare).
I've read it now and my comment makes little sense in context. I see they stated some users "have agreed to leave location sharing on all the time so Foursquare can track and analyze their movements." I'm not really sure how this is any different than what they were doing 8 years ago so I do, non-sarcastically, "wonder how that can be maintained".
