In the slack I read the dev talking about looking for the best method for distribution in the next round, the one that's least vulnerable to abuse, and they will announce it when it's ready, some time in March. He wrote that today.
They cannot completely eliminate abusers and airdrop cheaters.
They should hire more people to check all participants before the airdrop. a strict checking and verification will at least lessen the cheating.
That's a funny idea. "Hiring" people to check airdrop applicants.

The best way imo is to connect multiple accounts so that you can't apply with your 389 BCT alt accounts. Telegram needs a phone number, for example. Most people have only one number and one Telegram account so that would reduce the abuse.