If you have opted out of receiving email, text, and/or Pulse messages from a company, and you want to resubscribe, you can do that through Application Transparency.
In the Pulse App, click on the Menu button then choose
, here you can see all the carriers who have ever received your application data and what your opt-in statuses are for each.
If you see a red X, click on it to resubscribe and it will turn into a green check mark. The green bubble with a check mark means that you are opted back in or resubscribed!