Hi,
Have you checked out Knowledge.io? I've read the whitepaper myself, gone through all the info I've got my hands on and even had a few chats with the developers and product heads through their public telegram group. So far everything checks out for me in terms of product idea, a team capable of carrying out the project to fruition and they even have working prototype apps you can download on the IOS appstore to see one of the many facets in their ecosystem.
The main problem it seems they are trying to tackle is decentralising advertising, and not just in the way BAT/Brave Browser is trying to do which is only in tracking user attention/engagement with ads; knowledge.io is attempting to create an entirely new ecosystem for advertisers to directly engage consumers by asking consumers questions. The consumers get rewarded for participating in these Q&Ads and the Advertisers get direct targeted information. This would create entirely new datasets unique from what the rest of the advertising world has and when done right will help advertisers to target consumers more accurately than say Google or Facebook.
Hope you guys check it out, lemme know what you think!