Component/UserComponent.php
protected function validateRegistrationOptin()
    {
        $return = true;
        $optin = (int) $this->getRequestParameter('oegdproptin_userregistration');
        //1 is for guest buy, 3 for account creation
        $registrationOption = (int) $this->getRequestParameter('option');
        if (\OxidEsales\Eshop\Core\Registry::getConfig()->getConfigParam('blOeGdprOptinUserRegistration') && (3 == $registrationOption) && (1 !== $optin)) {
            $return = false;
        }
        return $return;
    }
protected function validateRegistrationOptin()
    {
        $return = true;
        $optin = (int) $this->getRequestParameter('oegdproptin_userregistration');
        //1 is for guest buy, 3 for account creation
        $registrationOption = (int) $this->getRequestParameter('option');
        if (\OxidEsales\Eshop\Core\Registry::getConfig()->getConfigParam('blOeGdprOptinUserRegistration') && (3 == $registrationOption) && (1 !== $optin)) {
            $return = false;
        }
        return $return;
    }
Validate user registration optin.

@return bool