I have 1000 emails – how to monetize (survey)

I have a site that 1,000 of my customers have shared their email and agree to complete some research or servey or Questionnaire for free e-book.
With which affiliate program can I monetize ?

I have a site that 1,000 of my customers have shared their email and agree to complete some research or servey or Questionnaire for free e-book.
With which affiliate program can I monetize ?

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