I have only just "discovered" this site (I must've been blind!) but as soon as I did, and saw the depth of coverage, the POIs, and the lively Postings I thought this must be worth joining. I joined immediately.
If you view all this on a "value for money" basis, then judging from other people's responses it clearly is "worth it". But I view it more as helping to keep a "community" going and alive. If my subscription supports a "wild camping community", I'm all for it. Discounts, POIs, etc., are just a bonus.
Barry