In reply to LucaC:
As well as alienating regular customers, it is a great way of stopping traveling climbers and other occasional visitors from using your wall.
If I am away from home with work and looking to get some training in, I am happy to pay the £8 or £10 for a one off visit. If the wall adds on an additional £5 or £10 registration fee, that can double the cost of a one off or occasional visit. So I just won't go.
This is the reason I never visit one of my local walls. I have an annual membership at one wall (that doesn't charge a registration fee) but there is another wall nearby that I would visit a few times a year, except they charge an annual registration fee (which is compulsory and does not entitle you to a discounted entry fee). So I have the choice of going to my usual wall where each additional visit is free, training at home which is free, or going to the other wall which would cost £15 for that first visit per year. I haven't been to that wall in the past 2 years, even though it is my closest wall. Their annual registration fee has probably cost them over £100 of lost business from me over that period.
Post edited at 16:15