They're free, right? I think it's okay if you want to follow them or not. This kind of airdrop usually just to attract more followers on the related account. The problem would be in the later, about whether the token will have a value in the market or not. Oh wait, is it listed already? Which I kinda doubt that was the case. So this kind o token, it;s only either it the value will be very low or just any other shit-token in your bag.