Actually, no, you're wrong. Apple doesn't use such information for "marketing purposes." Here is the privacy statement from the iCloud User Agreement:
Apple (iCloud) Privacy PolicyYou understand that by using the Service, you consent and agree to the collection and use of certain information about you and your use of the Service in accordance with Apple’s Privacy Policy. You further consent and agree that Apple may collect, use, transmit, process and maintain information related to your Account, and any devices or computers registered thereunder, for purposes of providing the Service, and any features therein, to you. Information collected by Apple when you use the Service may also include technical, statistical, or diagnostic information related to or resulting from your use that may be used by Apple to support, improve and enhance Apple’s products and services. For more information please read our full privacy policy at http://www.apple.com/privacy/. You further understand and agree that this information may be transferred to the United States and/or other countries for storage, processing and use by Apple, its affiliates, and/or their service providers. Please note that personal information regarding individuals who reside in a member state of the European Economic Area (EEA) is controlled by Apple Distribution International in Cork, Ireland.
It's quite different from Google's.
Google’s doesn’t say anything about allowing hackers to post your private pictures everywhere.