I'd love that, as I probably only go to 3 home games a season at the moment. However when the club can't sell all their "spare" seats why would they let you sell yours ahead of them ?
That only really works when there's a weekly sell out.
We will sell out must weeks in the Premiership. The club could also sell these season ticket can't attend seats at half price and pay the season tickets half back. This is what NFL sides do as I bought a packers ticket through their scheme.