Grip it and rip it
Hacker
CGL is, as many many such organisers, arranging events for individuls on a basis of them choosing to play - or not.
it doesn't seem to represent itself on the basis of 'we can get you on the course cheaper' or similar; far from it, it appeals to the easy arrangements banner in the same way as many similar groups - picking one that has been raised here before yuou have Golf Day's UK and it's 'Tours'.
Can an individual arrange to play these courses 'cheaper' - yes. Is the margin involved to play an organsied event with structure, prizes, etc - only the individual can decide; if you are SE and charged at £30 ph it's rather obvious that 30 mins phoning around to arrange a tee time is £15.....strangely some people don't put any value on their time (move on) and other's put an even more realistic value on the hassle that such arrangers resolve (as I would/do)
Long way of saying - make your own mind up
surely thats the whole point of a society, to play courses cheaper as a large group discount - basic rules of purchasing/selling
so in essence why pay more for something you can get cheaper, would you buy a car for £xxx amount more than advertised if you had 30 people wanting to buy it as well