Potentially, but as occurred last season, plenty of clubs reported increases in membership numbers as supporters actually rallied around their clubs...funny how people actually stick fat with their clubs when times get tough.If GA club members are unable to access games it wouldn't surprise me to see memberships drop dramatically. A one year donation I get but 2 years in a row? Particularly in the current economy. Docklands teams like Saints, North and Dogs could be impacted far more due to the limited capacity.
Again, hopefully it will be short term and things can get back to normal relatively quickly (AFL pushing for 75% capacity apparently) but if not I think the clubs and AFL will be in for a bit of a shock.
Obviously AFL Members have different incentives to club members, so maybe more of them will walk away.
Guess the winners there would be the people waiting to get to Gold.