If I understand G&W's business model, they expect their railways to financially stand on their own merits.
OVR, like most other shortlines, simply leases the railway from CPKC. Prior to abandonment, their revenue was bridge traffic for CP. Once CP decided to route everything through Toronto, the line made no financial sense. South of Mattawa (Temiskaming) there was very little revenue. I don't know the abandonment process intimately, but I would assume that if it was being sold to an operating railway, it would go for more than scrap value.
Short of nationalization or some other form of public support, for-profit companies will act like for-profit companies.