Well, taking train/bus is 5,6€ each r/t, so if the seasonal price is 10€ it may very well be cheaper.

Two disadvantages though: Seasonal means no service for several months of the year. And it is station based, ie you must return the bike to a station within 30 minutes or pay penalty. Luckily there is a station near Clarion, but not being able to keep bike overnight is a disadvantage.