Yes, your "feed" is populated with answers and questions about products from the people you follow. We give a few people who you can opt to follow when onboarding. Because you can see other users who answered a question asked by someone you follow, and see the question answered by someone you follow, you can be exposed to new users (who you can then follow).

You're more likely to trust user reviews on this site because the reviews are likely to be coming from people who you are connected to in some way.

We haven't been around too long (launched mid-November, have a team of 7: 1 iOS, 2 backend eningeers, and product/marketing/community folks, plus a few contractors), but we'll be rolling out more features to help evaluate the trustworthiness of the reviews that users see.