Trading XNS:
https://crex24.com/exchange/XNS-BTC
https://idex.market/eth/xns
https://opendex.market/ETH-XNS
https://www.bitcratic.com/#!/trade/XNS-ETH
Trading XNB:
P2PB2B
https://p2pb2b.io/trade/XNB_BTC
https://p2pb2b.io/trade/XNB_ETH
https://p2pb2b.io/trade/XNB_USD
CREX24
https://crex24.com/exchange/XNB-BTC
STEX:
https://app.stex.com/en/basic-trade/pair/BTC/XNB
GRAVIEX:
https://graviex.net/markets/xnbbtc
The airdrop program should be based on the trading volume of the exchange. Calculating on the trading volume on the floor to determine the bonus will stimulate more exchange. The current airdrop does a lot of manipulation so the community is not interested in participating.