Profit-Making PSU?!

From The Hindu. KSRTC gets an award for

the successful delivery of “multiple end results” ranging from quality customer care, environment protection and fuel conservation to better overall use of available resources, transforming a typically cash-constrained transportation PSU into a viable business entity, thereby becoming a role model for other State PSUs.

But PSU''s are not supposed to be viable business entities! Loss-making, draining the public exchequer, yes. Profit-making, no. That's what I was led to believe.