I may have missed it. But will there be coin pairing of all coins (ex XC/BLOCK) on poloniex? or just BTC/BLOCK?
When ITO starts there will be sell walls of BlockNet tokens on Bittrex , Poloniex , Bter - pairs BTC/BLOCK
You will be able to buy also BlockNet tokens on coingateway.net with participating currencies at a 10% discount
After ITO, BlockNet shares will be still tradeable on mentioned exchanges , BLOCK/BTC pairs will stay there
Are we able to sell the tokens for BTC after the sale is over?
Yup. At Bittrex, Poloniex, Bter, and Coingateway.
The BTC:BLOCK pairing will continue until tokens are redeemable for NHZ assets (when fee payouts begin).