I am going to urgently make enquiries about support for you @MajorHavoc - I will also send you an direct message so that you can send me those screenshots.
I don't work on the client team, especially not for Mac, but I will get them across to people who do.
The initial responses I have had is that it is supported on 10.10 and above, and that matches with what I can see at https://www.webroot.com/us/en/home/products/vpn-wifi-security
I am trying to see on the website where support for 10.9.x is cited - do you have a URL or screenshot?
@MajorHavoc I think what might have happened here is you looked at the left column under "PC & Mac Requirements" and saw the supported operating system for our Mac antivirus client and (not unreasonably) misread that as the requirements for WiFi Security which are in the column on the far right of that page. This is listed as "OS X 10.10 (Yosemite®) and newer".
I am going to get in touch with the team that look after the website as that is definitely confusing on a page specifically referring to Webroot WiFi Security.