IMO, just by asking the question you already have your answer, they have not deliver the value to meet expectations.
Perhaps i am a little short sighted here, but paying to join a group ride?? Is there a support van/car? a mechanic? shop provides some spare wheels to ensure everyone finishes the ride without having to stop/delay others for flats?
Around here, there are a bunch of paid rides with some of the above mentioned perks in some form or another.