function eddrcp_add_subscription_access($payment_id, $new_status, $old_status) {

  if( $new_status != 'publish' && $new_status != 'complete')
		return;

	$payment_data 	= get_post_meta($payment_id, '_edd_payment_meta', true);
	$user_info 	= maybe_unserialize($payment_data['user_info']);
	$user_id = $user_info['id'];

	if(!rcp_is_active($user_id)) {
		$subscription_key = urlencode(strtolower(md5(uniqid())));
		update_user_meta($user_id, 'rcp_expiration', date('Y-m-d', strtotime('+30 days')));
		update_user_meta($user_id, 'rcp_subscription_key', $subscription_key );
		update_user_meta($user_id, 'rcp_subscription_level', 1);
		update_user_meta($user_id, 'rcp_recurring', 'no');
		rcp_set_status($user_id, 'active');
	}
}
add_action('edd_update_payment_status', 'eddrcp_add_subscription_access', 10, 3);