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3. Agree to participate

Alternative clues for the word optin

• Decide to take part
• Sign up for an offering, e.g
• Decide to join, e.g
• Choose to be included
• Agree to receive marketing email, say
• Sign up to receive email alerts, say
• Allow oneself to be data-mined, perhaps
• Elect to take part
• Choose to take part
• Join a mailing list