Why would that command an extra entry fee? Not saying you are incorrect, but it's the first I've heard of it, nor can I find anything about it in any documents I've sifted through. So am genuinely curious about it.
I don't really think it's overly relevant to the TC though. I can't imagine any additional entry fee would be that substantial that it'd make a huge difference to the first team, or mean less games taken on the road.
In fact as 2B mentions above it helps our first team by giving fringe players game time. It also adds value to a season ticket by giving fans entry to an additional 9 games of football per season.