Retargeting adult newsletter subscribers is possible, but you have to be careful with the rules. Many ad networks don't allow adult content or traffic, so if you're using a platform like Google or Facebook, you might run into problems. Even if subscribers agreed to your emails, retargeting them with ads through platforms that don't allow adult topics could lead to account bans. The best way is to use platforms that accept adult content and make sure your campaigns follow their policies. Always keep your privacy settings in mind and don't collect or use data in ways that can be flagged. As long as you stick with approved networks and your audience gave proper consent, it can be done safely. It helps to read the terms of the network you plan to use. Has anyone tried other platforms for retargeting adult traffic in a way that worked well?