According to a recent Northeastern University study, you may pay more when shopping online based on your web browsing history or even the kind of smartphone you use. Some consumers have seen their credit limits reduced because they shopped at stores frequented by cardholders with poor payment histories. It’s not inconceivable to think insurance companies might eventually string your data together to determine if you’re insurable, how high your premiums should be based on your perceived risk, or that credit card companies could use your shopping habits to determine your credit worthiness or raise your interest rates.

Huffington Post