As I understand it, one of the main benefits of joining the VRCT is that it is thought that it will make it easier to transfer to the register when it comes in. It is a 'when' rather than an 'if'.
If the VRCT is large enough, it is more likely to have some input into the registration process, as opposed to regulations being purely imposed.
As for signing up, I had no problem. I also view the annual fee in the same way as other membership fees - a necessary evil to ensure that details etc are correct.