There is already incentive for the private operators to not lose these gases during production or transmission as it cuts into their margins. This is like leaving money on the table.
https://www.nytimes.com/2018/06/21/climate/methane-leaks.htm...
Instead, you can find industry groups quoted in that article complaining about the study.
What happens often is that s small player seizes the opportunity and then gets bought.
Maybe there are regulations that keep smaller and / or separate entities from acting in this regard.