public function isSubscription()
    {
        $started = $this->subscriptionStarted();
        $status = $this->status();
        $time = time();

        if ($started !== '' && is_numeric($started) && $status !== '' && $status !== 'canceled' && $time < $this->subscriptionEndsAt()) {
            return true;
        } else {
            return false;
        }
    }