Forgive me if this is naïve, but how does Joe Random site owner participate in the selling of data? My impression is that that's an area of commerce with a pretty closed membership.
I'm not asking in order to do something like this, just that I think it's an interesting question about exactly who is able to profit from activities that are somewhat assumed to be occurring everywhere, and not by and within the ad networks that everybody is using.
I was talking about the companies that would be in the position to do subscription bundle handling, and they're more interested in the current situation.
Publishers can participate in selling user logins and analytics data through various data companies, they're always interested in more data and especially anything unique that your site adds. You should have a certain scale though for the contract to be worth it, otherwise if its just a personal blog then you're probably just limited to run adding some ads from the typical ad networks.
The only places that buy and sell user data are spammy mailing lists. That's it.
Browser history predicts almost nothing, anyway. There is no market where user data is bought and sold, except for spammy mailing lists to other spammy mailing lists.
There is a vast market for consumer data (which is more than just browsing history) with everything from credit agencies like Equifax to data brokers like Axciom to traditional analytics companies like Nielsen and Comscore to top tech companies like Google, Adobe, Oracle, Salesforce, and others that have marketing clouds with DMP platforms. It's a massive industry.
I'm not asking in order to do something like this, just that I think it's an interesting question about exactly who is able to profit from activities that are somewhat assumed to be occurring everywhere, and not by and within the ad networks that everybody is using.