AnsPress_Hooks::comment_subscription()

Method: Add comment subscriber.

AnsPress_Hooks::delete_comment_subscriptions()

Method: Delete comment subscriptions right before deleting comment.

AnsPress_Hooks::delete_subscriptions()

Method: Delete subscriptions.

AnsPress_Hooks::answer_subscription()

Method: Subscribe author to their answer. Answer id is stored in event name.

AnsPress_Hooks::question_subscription()

Method: Subscribe OP to his own question.