Just use a stablecoin, don't float a "utility token" those things are stupid. Have a smart contract receive a USDC deposit. If the maintainer "times out" reviewing your PR, the contract returns all the deposit. If the maintainer does not accept your PR, the contract burns 0.5x of the deposit and returns the rest. Maintainers can decide to turn off the time-out for very popular projects where you probably would have devs trying to spam PRs for fame/recognition, but hopefully the deposit price can accurately reflect the amount of spam the project gets.
Utility tokens are fundamentally equities and you need to firewall equity from an organization the same way companies in most market economies are regulated.