Facebook's Beacon effort was a failure largely because it was "opt-out" instead of "opt-in."

Question

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Facebook's Beacon was considered a failure because it automatically shared users' activities on partnered sites without explicit permission, causing privacy concerns. It was "opt-out," meaning users were included unless they took action to exclude themselves, rather than "opt-in," where users would actively choose to participate.

Facebook's Beacon Effort Was a Failure Largely Because It Was