1) Have you gone through every line in their Terms of Us or whatever policy? Is there anything stating your info is private or the company is not allowed to use it?
2) As many said, most if not all companies are selling information, you think you have an account with banks/telco, they wont use it to their benefit ka ? The fact that your on "www" is already giving info to companies like google and companies do buy data u know ...
3) And unless you have proof, your claims are invalid. Infact, whats stopping 11street from suing you for defaming them without proof?
Thou many here will appreciate your heads up.