This is a new bounty this spring offered by Marinecoin.  MTC is using proof of promotion to pass out their coins.  A dev-less artificial intelligence system manages the ico to insure fair distribution.  Time dilution technology gives everyone plenty of time to earn many MTC for promotion efforts.  The blockchain will have value since it is designed for iot machine to machine transactions.  Zero fees and fast transactions will insure long term prosperity for this blockchain.  Check it out here marineco.in