Yes! You should update your privacy policies when you start using Retention.com, and here’s the text to use:
Third Party Pixels and Cookies
When you visit our website, log in, register or open an email, cookies, ad beacons, and similar technologies may be used by our online data partners or vendors to associate these activities with information they or others have about you, including your email address. We (or service providers on our behalf) may then send communications and marketing to these email addresses. You may opt out of receiving this advertising by visiting https://app.retention.com/optout.