I think the link with Scotrail is an interesting one. It would be instructive to be told in due course what the take up is, although I doubt that we shall be.
Nevertheless, on the face of things a free trip from PIK to anywhere in Scotland served by Scotrail seems inviting.
The only thing that bugs me a bit is the half fare on Scotrail after the free 6-month period. Fifty per cent of what? Fifty per cent of full fares can often be more than the many 'offer' fares that all the railway companies come up with.
Nevertheless, I still think it a worthwhile innovation. Who knows, if it catches on other lo cos might switch to PIK and link into the pan Scotland rail system.