You can load your own software on to an iOS device provided you have access to the code. AFAIK iOS dev tools that enable you to load apps onto the device no longer require the $99 annual fee so if you download them you can side-load software.
"Except when you use the NEHotspotHelper class, you do not need to obtain entitlements from Apple to use Network Extension classes. However, you still need to enable the Network Extension entitlement via the Developer portal."
They're merely handing out breadcrumbs to give the appearance of a way out which they can retract at any time.