I'm not sure what happens elsewhere around the world. But here in Australia every club competition has a ball comp for overall score, balls for nearest to pin, and often an "eagles nest". I'm sure I'm not the only one that rarely pays for balls.
My Club Pro is actually very forgiving as he'll often happily go me ball for ball and I play $8 balls.
I know we have credit prizes here on WGT. Couldn't balls be added to the prize / tournie pools?
I'm no scab. I paid cash for credits to buy some gear and no doubt in the future will have to do so again. But I do believe the decent balls pricing is too high and out of proportion.