I downloaded the rules, the comments basically say they're "modified or changed from the CRS." Take that as you will; the rule ID numbers are still in the 200,000 to 299,999 range which is reserved for the CRS / Modsecurity.org rules.Sounded like there had to be a catch. Sounds to me like they want to get you using their plug-in and then sell you additional services.
Has anybody tried the plug-in yet?
I didn't try the plug-in since I wasn't impressed with the content of the rule set. I agree they're probably just trying to get their name out more to sell people additional services.