Would allowing Two-Step Verification impact my relationships with third parties? (Examples include data aggregators, integrators, and screen scrapers.)
Enabling Two-Step Verification should not impact your relationships with third parties, as it only affects the security of your own account. However, if you have authorized third-party applications or services to access your Amazon account, you may need to update your account settings to ensure that Two-Step Verification does not interfere with these services.
Of course not, as the two-step verification is a security procedure to make your account more secure, so it should not have any effect on your relationships with third parties.