The range brass will be used at ranges that keep the brass.
The only brass I let a range keep is .22 rimfire, or Berdan primed. The way I see it, any range that steals my property loses me as a customer, period.
IF I let them keep it, if I leave it, fine, that's giving permission, otherwise, no barking way.
Do be careful, to avoid giving them permission when you don't intend to. If you sign something that says you agree to follow all range rules, and "fired brass becomes property of the range" is one of their rules, you are giving them permission.
I won't. They don't own my brass because it touched their ground. They don't own my gun because I laid it on their table. They don't own my car because its parked in their lot, and they don't own my butt because I sat on their bench. IF those or anything like them are the house rules, I'll go play and spend my money other places.
If you think I'm being a bit ...extreme... because, after all its only fired brass and doesn't cost that much, I disagree on principle, and in reality, because some of what I shoot isn't cheap, common or easily available, some of it is hand made by me, not made by any factory, and I'm not throwing that away because of a range owner's grasping greed.
I DO throw away any brass with a "Glock bulge" IF any somehow winds up in my brass stash, it goes in the scrap bin when I see it.