There will be no future upgrade and support for XBS from bitstake team. XBS is an open source software and anyone is welcome to continue it's development.
If you think your new direction is operating NairEx, there is absolutely no reason you can't keep a wallet open for XBS on that platform, what does it cost to support a second coin? NOTHING.
But this should be no surprise, you're probably going on to your next rinse and repeat BTC scam like Xcloud, Viorcoin, and all the others Ray Carlo.
So should I take this coin over or what?