It is true that the members of a group are after where the value or otherwise of a syndicate lies. I have been in 3 groups in my time and am a day VFR type, an hour here or there and the odd (sometimes very odd..) land away.
A couple of years ago I thought I had found the perfect share in a PA28...local grass airfied...8 miles from home..low monthlies and hourlies etc. however it soon became apparent that one member viewed it as his personal weekend aircraft and had it booked months in advance for days at a time. So much so that the rest of the group had to try to find the "crumbs" left and be satisfied with them.
I had to sell this one as I was not happy to fund someone else's flying to that extent. He even neglected to attend a group cleaning session, but showed up immediately after it to fly the shiny clean aeroplane.
Upon trying to sell the aircraft, the group "leader" should we say was not particularly happy with the person I had decided to sell it to (not for flying reasons I might add as he had never flown with him) and decided to invent a new set of rules that did not exist about how he had to approve new members etc. This was not in the rules at all. However he did make it as difficult as possible to sell to my chosen buyer.
Life being too short to deal with throbbers like this I found a group at a close by airfield with a less than ideal aircraft type but this group, and its trustee are the polar opposite. I now rent an aircraft when I need a 4 seater and fuly intend to stay in this group.
With syndicates it pays to be flexible on your aircraft choice....and I would always insist at being allowed to look at the booking diary to see if any names seem to be hogging it.