Affiliated Sites

Just looking at booking an affiliated site. The site was £127 for 4 nights and the discount for CC membership was £7. Booking terms are £10 deposit per night. There is a charge for dogs, and if we wanted to add children, awning, extra cars etc  it would be even more.  It seems that these sites get an awful lot of publicity/benefits by being on the club website, but offer very little benefit back to the club as they operate under their own terms and conditions?