A bounty program, an airdrop, a campaign,... are sometime the same method or not for free token distribution. A bounty usually request to follow fb group, twitter, reddit, YT channel, Telegram,... Generally, it's very good way to earn free tokens. You can find the bounty program through the bitcointalk forum and many different social forums...
A bounty program is beneficial for earning cryptocurrency. Social media and bitcoin talk are ideal place for bounties. At present i am involved in ENLTE signatute campaign based on blockchain.
Last 29 days are left for ENLTE bounty program and ICO stage 2. Wonderful opportunity to join the crowdsale. User can use
kumar.rajudtu@gmail.com for referal code. The signature campaign should be active till 29 days. In twitter, telegram, instagram, facebook, you tube campaign is going on.