For hunt it is more about users not being able to vote and participate in hunts, though they can still get the airdrop, the problem was more around creating hunt posts and upvoting which is fixed now. For steem-bounty it is an engagement based bounty system and would not have problems post hard-fork.
Only one that might have issues is steemitboard since they aim at all users with notifications that said delegation will resolve that. It's short 17100 SP.
https://steemit.com/witness-category/@steem-bounty/steem-bounty-is-back-up
( We still need at least 17100 SP to be able to operate as before HF20.)
https://steemit.com/steemitboard/@steemitboard/steemitboard-knock-out-by-hardfork