I found out that the Qualcomm SDK provides Linux 3.4.103 with a proprietary Wi-Fi driver. My guess is that Ruckus just reused that, put their GUI on top with a few other "value add" features and shipped it.
Also, the Qualcomm SDK uses hostapd (despite mention of hostapd being removed from system logs), which means that Ruckus unleased customers are missing out on features like wpa_disable_eapol_key_retries because Ruckus decided to keep the sources to itself and not document how to enable it, assuming that they even grabbed the patch and added a hook to their management shell that would allow enabling it.