Tandem airdrops 1.000 TDM tokens (~$1,00) to their airdrop participants for the following simple tasks. They also offer a referral programm where you can earn additional TDM for each user you refer.
For Withdraw, you need min. 5.000 TDM tokens or you have successfully completed at least 1 trade on Tandem.
You also need to successfully complete KYC to withdraw your TDM tokens.