I really really hope that the "propensity score" doesn't try to check whether you have subscribed to other news sites in the past. I'm worried that a) it would

I really really hope that the "propensity score" doesn't try to check whether you have subscribed to other news sites in the past. I'm worried that a) it would work pretty well in the short term, and b) because it works it would spread. In a few years, if all the sites were doing this, then anyone who pays for journalism at at one site could find their propensity score raised, and encounter paywalls everywhere else. The last thing we should want is for consumers to internalize the notion that "only suckers pay for journalism because then you get locked out of the rest of the internet". Sort of like how people can be reluctant to ever give money to any charity because they know it will sell their info to other charities and they will be inundated with junk mail.