Robbo, Chicago and Gyro have all got correct and valid points, just at different points across the scale from punter to Tournament baller.
The first thing the sites have to do, and this is where they fall down in the UK, is generate more repeat custom. The short $ philosophy in the UK is so short sites do little to encourage Punters to return even 2/3 times a year, and that sucks from a business sense. There are lots of ways to generate repeat custom without losing customers to "walk-on" or Rec status and the way to do that is by the customers "value perception". A full days Paintball isn't actually an expensive day out even for customers, but if they perceive it as expensive or not delivering value they're not likely to return in a hurry. I mean look at the alternatives:
Half a days rally driving: 200 quid
6 laps in a Ferrari 200 quid
Half a day sailing on the Solent: 100 quid
2 hrs go-karting 60-100 quid
All are competing days out for sites traditional customer base.
There are other ways to generate perceived value without tackling or reducing the cost to the customer. I ain't going to say what they are (I mean there might be a new site opening soon, or not), but there are lots and the cost to the site owner is minimal. get the customer value perception up, and offer a better gaming experience, and then you will generate repeat custom. Get repeat Custom you will eventaully get Rec-ballers, get Rec-ballers you get more tournament players. If you can generate enough Rec-Ballers, a site should be able to offer both Customer and Rec-ball on the same day (assuming the site has multiple fields not all being utilised at once). Assuming all the sites Fixed costs are covered by the customers, the only additional cost you have of having Rec ballers is the variable cost of additional Marshals You won't make as much per head, but your rec-ballers only have to cover variable costs not fixed.
As always, taking the easy route out is taken. I mean, it's a piece of p*ss to open up a woodland site, and run customers through it playing war. Increasing customer value, brand loyalty and establishing repeat custom takes more work and thought.
Once you've moved from repeat customer to rec baller, and support a site with repeat custom, then ask if the site owner is willing to offer you a discount on paint. The more you play or the more people you bring in will encourage the site owner to do this (I mean Paintball sites are subject to economies of scale too). A smart site owner would tie any deal in with an increase in "customer" ballers, making the team generate him more higher revenue clients (bit similar to Gyro's earlier post).
The problem with that is, too many ballers want something for nothing, and believe the hype that they are "Sporting Superstars". You only have to read other sites and forums to see that people believe that many equate a "human-interest" piece on TV equates to sporting stardom, it don't when extreme ironing gets more air-play.