Hmm, I can't see storing credits being too beneficial. At least with that many, maybe a few just out of convenience.
Sam has thrown out the idea (at least on curious cat) of changing to some other (points) system and if he were to ever do so, any stored credits would just get converted to be of equal value in the new system.
And if JNC were to change hands the probable outcomes being:
a) something similar as the above
b) refund of stocked credits
c) choice between a and b
d) loose credits and no refund
But you never know, hope it works out.