DDK is a community platform that aims to create economic opportunities through the development of blockchain solutions. Since 2015, the DDK community claims to have contributed to a number of blockchain platforms.The DDK platform uses the Delegated Proof of Stake (DPoS) mechanism within its core. According to DDK, one of the advantages of a DPoS blockchain is that it depends on community members to participate in the maintenance and security of the platform so that each member’s participation provides benefit for all.
TrueFeedBack is a survey/bounty platform where companies, institutions, academicians or other interested parties can create surveys or bounties. Users can participate in these surveys and bounties, get incentives for participating and stay anonymous all the time.