BoolWallet airdrops 250 BTT tokens (~TBA) to their airdrop participants for the following simple tasks. They also offer a referral program where you can earn additional BTT for each user you refer.
After downloading the app and registering the wallet, users can enjoy the Lucky Draw feature and win Cryptocurrencies. Users can take up the draw every 24 hours and enjoy the cryptocurrencies that could be won.
There's also a chance to win 0.1 $BTC in a daily draw.
More information about BoolWallet can be found here.