The clubs that run Open Comps tend to run numerous Open Comps, sometimes they even hold golf weeks.
There are men's/junior/senior/ladies singles, men's/seniors/ladies pairs, men's/seniors/ladies 4 ball team, mixed pairs or mixed 3-4 team Open Comps. Plus mens/seniors/ladies member-guest events. That's an awful lot of memberships to give away.
Taking all these into consideration you could have 625 memberships for the price of 600. So I'm not in favour of the suggestion made above. Prizes for Open Comps are fine as they are IMO, but with the proceeds to be kept within the golf business. There is a lot of opportunity to experience golf at other courses out there are very good prices or even for free, I really don't think we need to be giving away free memberships as prizes or have I somehow got the wrong end of the free membership stick.
We also need to remember that in the UK, I can't speak for the RoW, there are multiple team matches between clubs - often 10-12-16 per side - mens/ladies/seniors/junior/mixed - and the golf is free as matches are annually/biannually reciprocal (food is normally paid for) so the if more opportunities to play other at other coureses for little financial outlay. There are also home clubs comps where the winners qualify for later rounds of tournaments or even separate tournaments at other clubs, and these are normally free to play in to.
As to the query about the price of entry to Open Comps, in my experience, sometimes it's a different price for members and those from other clubs, sometimes it's the same price, although usually it seems the member pays a lower entry fee.
atb