If there was a list of PTFC-minded businesses who contributed towards the club, then I would be minded to consider them first for any services that I needed. Of course this comes down to simple advertising and sponsorship deals, but if there was again a useful list of businesses and services, I for one would find it useful.
And if the club could somehow negotiate some kind of price reduction for Jags fans (season ticket holders, of course!!!), then even better.