If you read the policy, there's little they could change, as right now it's pretty much we can collect whatever we can from where ever we can including sites visited, facebook friends list, etc, and then do what ever we want with it as long as who we share it with affiliates who agree to abide by their privacy policy. They also state

Therefore, while Company uses reasonable efforts to protect your Personal Data, Company cannot guarantee its absolute security.

They will give you a 30 day notice though on changes to the policy.