We should really be looking at a total closer to 90,000 if the decision on crowd numbers is positive. There is obviously a fair chunk of "new" (read freebies) members in our current figure. Then add the expected 12,000 like you said. We also missed out on basically all the post-round-1 joiners last year, as no-one could go to games. There would also be a percentage of people waiting for more info on what the season looks like in terms of crowds, venues etc. before committing.Some weekly 2020 updates for comparison:
05 Feb: 55, 575 | 67,728 | +12,153
12 Feb: 57, 550
19 Feb: 59, 613
26 Feb: 61, 843
03 Mar: 64, 270
08 Aprl: 67, 000
It increased ~2000 members on average per week last year from this point, which would see us reach 80k by R1 if those figures are replicated.