"Data is the new oil."
The Datum ICO aims to build a marketplace for data. Users will be able to backup their data and even sell their anonymized data to NGOs and researches, all powered by the DAT blockchain. Putting users in charge of their own data and even empowering them to benefit from it is a powerful idea.
The pre-ICO has already sold out (5,000 ETH!) and the public ICO will launch on October 17th, but in the meantime you can earn 500 DAT or more (worth at least 0.05 ETH based on the ICO price, or at the time of this writing, $15) just by subscribing to the Datum newsletter. Plus, everyone who enters the bounty campaign is also entered to win 5,000 DAT tokens (worth 0.5 ETH or ~$150).
To secure your free DAT, sign up here: https://wn.nr/JsBGjs and follow the instructions. Also, make sure to do your own research on this ICO and consider investing!
(Remember, this is not to be taken as investment advice. DYOR!)