Subscribe one or more profiles to email marketing, SMS marketing, or both. If the list has double opt-in enabled, profiles will receive a message requiring their confirmation before subscribing. Otherwise, profiles will be immediately subscribed without receiving a confirmation message.
To add someone to a list without changing their subscription status, use Add Profile to List.
Rate limits: Burst: 75/s Steady: 700/m
Scopes: List Write Profiles Write Subscriptions Write