Personally I am long on PolyCUB, to be understood that I have not bought anything but I am reinvesting all my PolyCUB in xPolyCUB and they will remain there for the next months (or years?). It does not matter.
I decided to invest in CUB instead because it is much more advantageous economically and in the future it will offer other airdrops, pending the IDOs.
Taking into account a 60% APR in CUB kingdom, you're still a -40% down since currently yearly inflation for CUB is +100%, so keep that in mind. Polycub airdrop hasn't been a great incentive for CUB so far (price 100% retraced the announcement hype).