This is exactly why so many buggy racers 'join' the Schumacher team... for the tyre discount!!
Schumacher aren't daft - they make tyres that wear out fast and then quietly chip away at the racing community - giving average drivers 'B' drives - where they basically get a discount for buying direct and cut out your LHS
It's all wrong IMO - we should run harder compound tyres - and everyone (except perhaps the world class / full time team drivers) should have to buy them from their LHS.