I pay £35 for RFU membership just to be able to join the queue to have a chance of getting onto a website for 6nations tickets at Twickenham.
£25 to have the chance of getting the only half decent seats left at Goodison is good enough for me. (plus being entered onto the season ticket waiting list. Not sure if it includes European games though, hope it does)
In the context of the other situations that you mention it seems OK, but I still think it sets a bad precedent. Yes, this may be what it's like at other sporting venues, and perhaps I've just been sheltered from this by our lack of success and the relative ease with which I could buy a ticket until recently. However, you are essentially paying the club for the ability to give them more money. This ticket scarcity is driven by the amount of season tickets that have been sold because they have removed the season ticket cap (which is their right to do, and is probably a sensible move to make the most possible money), and then they benefit twofold because those who can't get, or can't afford season tickets, pay out more for the ability to fight for the scraps of what is left.