This is the main reason that I haven't got involved. They keep saying "airdrop" all over the place, when it is clearly not an airdrop. It is a signature campaign. They say "airdrop" just to generate more traffic.
If they are going to mislead people from the start, it seems unprofessional at best, and it doesn't bode well for developments further down the line.

I don't have an opinion on whether or not it's a scam, but they are certainly not 100% honest.