The solution offered is: "But instead of giving full maintenance or full publishing rights to new collaborators, the original developer would give new maintaine

The solution offered is: "But instead of giving full maintenance or full publishing rights to new collaborators, the original developer would give new maintainers or a CI system only signing rights. So they would sign their releases and after a careful review the original author would countersign stating that he checked and approves these changes." This is 100% equivalent to the maintainer merging a pull request. The other half of the solution is "we need to pay open source maintainers," which doesn't need a blockchain either. Blockchain doesn't help this scenario at all.