It's head and shoulders above all the subsidies to the car industry that just increase emissions. In terms of value it can't even be compared, one is positive and the other negative.
E.g. during the original 9 Euro Ticket, the government also reduced taxes on gas to fight inflation, and this cost as much as the subsidies for the 9 Euro Ticket. The gas tax reduction's costs were 3 billion, and the 9 Euro Ticket costs were 2.5 billion.
So I would call it exceptional value when compared to other things.
E.g. during the original 9 Euro Ticket, the government also reduced taxes on gas to fight inflation, and this cost as much as the subsidies for the 9 Euro Ticket. The gas tax reduction's costs were 3 billion, and the 9 Euro Ticket costs were 2.5 billion.
So I would call it exceptional value when compared to other things.