We use MODX for the majority of a site but use Lemonstand for the ecommerce section. It won't install on MODX Cloud because of one missing requirement, namely Short PHP tags are not allowed:
PHP 5.2.5 or higher: Passed
PHP CURL library: Passed
PHP OpenSSL library: Passed
PHP Mcrypt library: Passed
PHP MySQL functions: Passed
PHP Multibyte String functions
Short PHP tags allowed: Failed
Permissions for PHP to write to the installation directory: Passed
PHP SOAP library - required for some payment gateways, specifically for the E-xact Web Service: Passed
Is it possible to enable this or should we look at traditional hosting?
Also on traditional hostings the short tags are disabled a lot..
As I am not sure, this is default setting by PHP5.3+ if I remember correctly...
Why do you want it to be enabled?? Use <?php instead of only <?
If you put in a support request for this, it can be enabled only for your account.