Its great that the vast majority of replies and have tried to come up with sensible conclusions. On the micro level there is no doubt if you had £5 offers every game you would see an improvement, but 27k for Brentford? I very much doubt it.
I think we have established that Cardiff is not a football hotbed and our fans are fickle but why? What impact does rugby have, even if people only turn up in numbers for internationals? Is there a cultural thing at play? Just asking.