I don't think it worth it, You need to pay gas fee every time you deposit or withdraw something and with this crazy ethereum network i don't know when you get your tokens to huobi!
Not every airdrop worth it!
I agree with you, currently the ethereum network to pay gas tariffs has reached the stars, and it is not at all convenient to make many moves on the ethereum network for the moment, but of course it would compensate with the $ 50 bonus that it will receive, which in the end it will be $ 35-40 net of the fees paid previously