i'm not aware of there ever being any explicitly pro-c instances, just instances that aren't explicitly anti-c and ones that are (and of course, instances in which most members are pro-c, which well, are most instances lol)

(note that i'm using "anti-c" as "anti-c fundamentalist" (explanation on my website) and "pro-c" as "not an anti-c fundamentalist", since those terms are often used in various different ways lol, so without making it clear what you mean it can be confusing)