What makes you think it’s not a real club?
Because it exhibits very few of the characteristics of a real cycling club.
Real cycling clubs tend to be composed of people that know each other, ride together and have something that brings them together, usually location. They also work as a support network, a training group, and most importantly they often bring new people into the sport, including kids, and educate them in the world of cycling.
Rapha RCC is just another way for Rapha to fleece people of their excessive salaries.
I own some Rapha stuff, mainly accessories- I’m not just a Rapha hater.