Probably get laughed at, but...
Yes, for a 19 year no-money game, so purpose of cheaper rebuy is more targeted/unique...
A single rebuy each permitted in the first six levels at 1/3 of starting stack. Was mostly implemented to allow new players a second chance and enjoy themselves a bit longer, since regs destroy newbs. But a reduced rebuy was needed due to being no-money game; a way to discourage losing an entire starting stack knowing you could just rebuy for free for a full stack. Works quite well for us, since people treat the game seriously rather than the silliness that a no-money game often ends up as.
For money game, I still kind of like the concept. Perhaps a single half stack rebuy at half cost. Make people weigh up the risk; would I rather keep my 3/4 stack or risk rebuying for even fewer chips. But, my preference for money tournaments is for freezeouts, so bit biased.