No bonus was mentioned as far as i know, maybe you are thinking about the redistribution of the profits from the integrated exchange which should be out in Q1 2018.
Yes, Profits for the exchange will be distributed to NVO holders, as mentioned in the whitepaper (P.13)
"50% of all fees per trade on the exchange will be automatically distributed to addresses with NVO
tokens on a weekly basis in the form of NVSX when the exchange is production ready."As of right now, the only way to get NVO is by creating a Counterparty wallet;
https://medium.com/nvo-exchange/how-to-buy-and-trade-nvst-nvo-tokens-on-counterparty-decentralized-exchange-d82566f1316b