You can to be a participant on the projects of ICOs on here https://bitcointalk.org/index.php?board=238.0 you will get usually token ERC20 of ethereum from the developer of team and i don't think you will get the money because of it, many airdrop out there but just a little amount of airdrop will gives you the money in ethereum. However choose the good airdrop is not easy you must learn about the projects first before desicions to join in there. Good luck for you