is the payment for your bounty program will happen after the end of your round 3 ico? it is not clear from your statement, after the end of token sales? so after round 3? in case, that's a long way to go as it ends by next year...
The Bounty program is to be finished after the token sale. It, in turn, can be closed before the Round 3, if all the tokens are sold.
The payouts are made in Ether, not in PXP. So, it worth taking part in it.
what if up to round 3 all tokens were not sold? are you going to migrate to IEO? or you will continue to develop project and will reduce allocation for bounty?