Well, if you were to ask me, what I can think and I can say that the project you have said is partially a scam because supposedly an airdrop has no charge and you will not be asked to send any cryptocurrency or amount into any address because an airdrop is a free event for token dissemination wherein you just have to register and sometimes do some sort of requirements to be able to participate into an airdrop event. Well, based on my experience, I haven't encountered any airdrop asking for a participant to sent an amount into an address to be able to take a place in joining an airdrop event. You do really need to be wise and observant most of the time so that you won't be able to fall or get fooled into such schemes that just aim to scam everyone. Better before doing anything on hand, do research or educate yourself to be able to keep yourself ready and alert all the time to avoid such scams.