Thanks Sean, interesting info, but if people feel passionate about film, then perhaps a small prescription charge is not too much to ask. Would such a move provide an extra intake of cash/commitment or not? I don't know, but perhaps food for thought. It may be worth a trial run, but I'm sure others will have views about this.
I think locking the site down could potentially reduce traffic which could in turn reduce registrations and subscriptions. There's no way to know for sure but it seems a fragile balance between getting members, keeping members and eventually getting them to subscribe. If any firewalls go up it could turn many people off.