I've recently been learning about how companies and crypto projects are using airdrops to advertise and market their products/services. If you aren't familiar, airdrops are essentially token incentives for users. Projects will give away free tokens/crypto to users who sign up for their platform. I'm curios if anyone is familiar with this type of advertising/marketing?

This is a website I found to be helpful to find airdrops; airdrop-review.com.

Would love to hear what everyone thinks of this promotional/advertising technique.