Well explain how Binance and Huobi who were the ones who got Justin into those witness positions get an Airdrop, whilst those voting after the fact don't?

Good question.

On Huobi, it is true the participated in getting Justin his sock puppet witnesses but as soon as they realized what they had done, they immediately reversed their vote and started powering down.

On Binance, they also reversed their vote and started powering down but they never opened up withdrawals. Even with withdrawals deactivated for customers, somehow Justin Sun was able to withdraw 3.6M Steem from Binance. Clearly, unlike Huobi Binance are still in bed with Justin.

That is why many people including myself are against airdropping Binance the new Hive tokens.

However, doing that would void legitimate claims from steem users who have their funds frozen on Binance.

If it were up to me, I would consider everybody else collateral damage so Sun doesn't get a single Hive coin free, but that would be the childish vindictiveness previously alluded to.