I have to believe that 1Ks are pretty low on the offload list, or why do we even bother with premier status? Changing to a new flight will be difficult if not impossible for a few days, so I wouldn't recommend volunteering your seat unless you don't need to be in Boston for any particular purpose and can wait a few days. This storm is going to be bad.

I think your theory on the diversion may be correct, however if not, the people of Gander are quite friendly.