Sorry I'm not understand about the 2000 btc collection thing , does it mean if less they is no sale of coins ,
And if no sales happens , bounty on sig campaign ?. Is void ?
Sales will happen and you will get your bounty on sig campaign.
From Bittrex's
Bittrex will host 6,627,494 Breakout Coins (BRK). The Breakout Coin price will have a floor at 4500/BTC. If all 6,627,494 BRK are not sold at this price raising approximately 1,472.79 BTC, the unsold Breakout Coin will be provably destroyed by Bittrex. If more than 1,472.79 BTC are collected, then the 6,627,494 BRK will be split proportional to the funds received.