Because the service would need to remember for its whole lifetime who created it. And the next thing people would ask to be able to donate resources to someone

Because the service would need to remember for its whole lifetime who created it. And the next thing people would ask to be able to donate resources to someone else And here we land with the tagging system. Most of the AWS resources accept tags. And you could have a tag called owner. And then tools like Cost Explore can break down the costs for you by Owner. The only thing you need to do yourself is to have a system or convention to enforce/encourage all resources to be tagged.