I am interested too to see how many people left, I don’t think NATCA is obligated to publish it anytime soon but I’m sure it will come out.
Related to this it seems like NATCA was going balls to the wall the last year to sign up contract towers, which is a little strange as they make no money off contract towers and don’t give a fuck about them.
I think it’s because if 600 real FAA NATCA members for example left this January, and they signed up 300 from contract towers, they can say they “only” lost 300 people (normally it’s about 30 each January).