I would be surprised if ISR lasts thru the next air drop.  I am still holding my ISR and i know other that are holding it to. Frankly its just not worth selling it .. I have stopped mining it and because there is two miners on my pool i am keeping it up for now.

http://whatmine.com/coin/388/Isracoin-ISR-Scrypt-Profitability

when i started with ISR it had 1.25 or more GH now its only got 250 MH as the network rate.

To me this looks like its dead. But I have been wrong before and I hope i'm wrong about this.