Founders use MomProof to find out whether the thing they are building is real. These are the studies currently looking for people, and each one says who it needs.
Taking part is ten minutes in a conversation, on your own schedule. You leave your LinkedIn profile so the founder knows who they are hearing from; we check it against who the study is looking for, and only go ahead if you genuinely match. Some studies offer a thank-you amount, paid to you directly by the founder.