Collaborative Information Collection and Sharing Facilities?

KnowledgePicker: https://knowledgepicker.com/ is a site for Collaborative Information Collection and Sharing. This KP site is evidently about 2 years in the making. It does not seem to have gained much traction, yet, but I’m particularly fond of the idea of collaborative teamwork and built-in double checking by other users.

Some interactions with the developers: https://www.reddit.com/r/KnowledgePicker/comments/

This site seems to me, to be a good start, on one of the resources that I’ve been missing.

Anyone know of other such efforts?