Why do they give me Tokens for free?
Their main goal is to get users who spread information throughout different social media channels about their project. Mostly it's about sharing and liking posts on their social media channels. As you can see the tasks are quite easy to fulfill. Because of your support more people will learn about their project. This will raise awareness and attract new potential investors. Obviously, a high user base and awareness have a positive impact on the token value. That's mainly the reason why they are giving you tokens for "free" - That's the way how they promote their projects!
There are different types of airdrops:
- Intial-Coin-Offering (ICO) Airdrops
These airdrops take place prior the ICO (Initial Coin Offering). Such airdrops need a longer time of period and can also be unsuccessfully if the project doesn’t collect their Soft Cap in their ICO.
- Holder Airdrops
Companies will distribute tokens to their token holders for free. To benefit from it, you need to have a defined token at a certain time period, so called snapshot, in your wallet.
- Hard Forks - Not so common
Requires to hold tokens on the Original Chain. Most famous examples, for that kind of airdrops, are Bitcoin Cash and Ethereum Classic.