Is Mapiz, the creator of AppNana, safe?

Browsing to a non-existing page like http://s.mapiz.com/appjoy reveals (on 29-Oct-2014) that nginx/1.1.19 is being used. However, Nginx 1.6.2 is the current stable version.

This might make the Mapiz website possibly vulnerable.

An e-mail has been send to support@Mapiz.com at 29-10-2014 to inform them.
However, no reply was received yet.

Comments or advisories are welcome!