Don't mind the "band wagon" jibe - it's like Clare hurlers, they're only hoping for an intemperate over-reaction.
Time was one could follow Cork, or any other county, the length and breadth of the country without ever being a member of a particular GAA Club. League matches as well as championship, win, lose, or draw.
As well as intercounty games I was going to club matches in various codes, in various age-groups and standards, for nigh on 50 years but, until relatively recently, wasn't a paid up member of any club - though I did help out on occasion.
Even All Ireland Hurling finals back in the day weren't always sold out - though that wasn't the case with the Football ones. Tickets went on general sale to the public - I can well remember taking an emergency day off work and queuing all day down the Pairc for tickets to one particular Cork v Tipp game in the late 80s early 90s; or going to Belfast and getting a spare ticket from a guy who'd not missed an AIFinal Hurling or Football in over 30 years; and always being there rain or shine to welcome home an AIF team win or lose - except when celebrating too much in dublin and missing the train

.
And there were many hundreds perhaps thousands like me that you'd see at various venues that you knew weren't current club members either. There were a crowd of us from a particular pub that I'd regularly have organised a bus down to Killarney or we'd go to Thurles or Limerick and the only guy who was a member of any club was one of our number who played for Father O'Callaghans. One of about a dozen or more guys. I met one of them last night and he still isn't a member of a club (he played for the barrs 50 odd years ago) and he goes to all Cork hurling matches, has a season ticket.
But with more disposable income and cars more prevalent and road networks improved, as well as dramatically improved stadia, many matches are now generally out of reach of the general public because of demand, certainly Cork hurling ones are.
The clubs are rightly imho seeing after their members first now that the demand is outstripping supply, but spare us the "band wagon" pish!