Doesn't ticking the CTC box then ask you for your CTC number? I think it used to. Whether that was ever checked, I don't know but seems unlikely.
Indeed - whether it asks for a membership number or not, I honestly don't know. But even if it does, what does that prove? AUK members are easy to corroborate against the database, but I presume AUK doesn't have access to CTC/CUK's membership lists.
Wouldn't scrapping non-member fees have the effect of reducing the number of members?
It seems a bit of a paradox to me. Temp fees are set at a level that theoretically encourages riders to sign up to get better value if they're entering more than a few events a year. But a number of people just aren't interested in being members and the fees are still low enough that the savings are not enough of an incentive. As a result, temp fees have become a significant source of income for AUK, and now they're suggesting increasing temp fees to further exploit this source of income. But the danger is that this will have the effect of persuading more people to sign up as members, which sounds like it may not necessarily be a good thing for cashflow...
For those people who are interested in being members, there are other incentives such as eligibility for awards and a shiny awoowoo popping through your letterbox four times a year.
Now that I'm thinking about this, I'm coming round to the idea that a flat-rate AUK admin fee to cover everything (insurance, brevet cards, validation etc) would be a good thing.