MVP's group does.
MVP group revives bid to buy gov’t stake in MRT3 | Inquirer Business
It's a business, and so long as they acquire it for the right price and are given flexibility in recovery of capex and opex, there's money to be made. What really killed the ability of MRT3's ability to properly maintain and upgrade was the ridiculously low fares that was set by government with no adjustments for over 20 years.