ETHSurvey
Decentralized Surveys Incentivized. Researchers/Companies get their product reviewed by genuine users around the globe. Users get paid for taking surveys.
About
The problem it solves In line with decentralizing information on the web, No one company should be the sole owner of all the data.
How it's made
Challenges we ran into Saving array of IPFS hashes and retrieving them from Solidity contract.