PINC started alpha testing for public on April 10th, 2018. It is very new with relatively few users at the moment.
When you log in, you'll be able to see "Suggested Users" at the top, which is currently the full list of users. Moving forward, "Suggested Users" will be limited to 15 and based on your preference, interactivity and influence (not how many followers they have, but how many likes, comments, gifts and products or services sold).
You are able to click to view the user's profile and their posts. On a later date, in future updates, you'll also be able to search for users.