The whole queuing system

Where better to start than a topic which seems so relavant, and is attracting so much attention from people right now? Just so that you know where I stand with all this, and then you can think about it some more.

The current system works thus (I think):
For each carset that is in the queue, when you click on the E-mail me link, not only does that mean that you will get sent an email, but you also 'vote' for that carset to be the next one to come out after another is full. And simply, the carset that most exceeds the number of spaces in the carset (say, BTCC has 32 spaces, and it's how many more than 32 it has), is the carset that gets the go. Sounds great, and it does work well enough. However, the problem comes when people, say, vote for an F1 carset, so it comes up, and then don't join for whatever reason (usually because they cannot get the car that they want).
However, if I set myself on the list for, say, MR2s, there's a good chance that I'll actually join. Surely that should be taken account of in the queuing system?

So, the basic idea is to not base it off the number needed to fill up the carset, just plain off, but to base it off the 'real life' number that you will need. Say, F1, 22 spots. If you start it when there are 22 people on the email list, then only 40% will actually join. So, go for it when 55 people are on the list, fully knowing that 33 of them won't join the game, will be put off by the lower cars or something, and then it goes quickly. Apply the same rule for all carsets, off data we already could get (simply, the numbers on the list, and how many join), and it might work. But then and again, it might not.

The end result would be that the carsets still come out judged through popularity, but it's done fairly, so it would be harder to get a F1 set going, and less likely to whitewash the available sets with F1s.