Airdrops are free coins. Maybe they are giving it for promotion or advertisements or maybe they just want to but most of the airdrops are cheap, some are given by a small amount, and some are scams. I have joined lots of airdrops but it haven't given me wealth but becoming rich is not instant so it is ok. There is no wrong on trying, just be careful to the airdrops that you are going to join.
Yeap. That pretty much sums it up. But aside from what you have stated, another reason also is to make the tokens/coins circulate. Which really helps the project itself. This action also draws a lot of people into the project. Which makes a lot of bounty hunters read the platform and realize its good sides. Which then gets these people to participate in the project's bounties. it really is a great source of small income to get a newbie started ij the crypto world. Well, that is, if the person has common sense and can differentiate a scam from a legitimate project.
