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Each Facebook User is Monitored by Thousands of Companies
(themarkup.org)
This is a most excellent place for technology news and articles.
i don't expect spotify to stop abusing me because i'm giving them money. that'd mean they miss out on profits.
That is an interesting question, at what point is it more profitable to care about your user's privacy rather than selling their data?
Logically, you could just take the income from the data you are selling, divide it among all users, add the smallest domination of currency you can, and set that as the cost of using your service.
However, then you need to handle payments, deal with added costs and administration, most people not wanting to pay and so forth.