McCain is cutting back the GOTV operation and shifting the money to TV ads.
OTOH, the current RCP electoral map shows PA as only "leaning" blue.
Addendum: According to the current map, McCain needs to run the board on every single tossup state, pick up both PA and OH, and then get one more electoral vote somewhere.
GOTV does not require a lot of money. Mostly volunteers and the GOP runs it on a bare bones budget. In 2004 in SE FL we had signs but no stakes because MoveOn.org thugs had been stealing them. I ran to Home Depot and spent $400 in my own money for stakes. The young GOP staffers were suprised. We started making signs and it was back to work.
The Dems usually have to spread money around to pay “volunteers.” There GOTV people are often slackers too.