Hi Adam,
We do not know who use the plugins.
I know that the person who have ask for this plugin use it and it works good for him.
About the examples, we made the plugin using the test account I gave you. We didn't have any extra information.
The version of "Innovative Gateway" we use just require a login and a password. That's the only thing that I know.
We didn't talk with Innovative Gateway, we just use their documentation and their test account in order to implement the plugin and test it.
Best regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.