Each club's membership numbers:
https://leagueunlimited.com/news/38415-2023-nrl-membership-tracker/
Today I learned that the smalled AFL club in terms of members (Gold Coast Suns) would rank third among the NRL clubs. I didn't realise the NRL clubs were so much smaller than the AFL clubs.
Ya was funny, after Roosters crowed about 20k the Swans sent out an email about 62k. AFAIK AFL memberships are quite varied and different, giving a lot more options / affordability.