If your portfolio has already been created, you can make it public.
Click on "My Portfolios" in the upper part of a display.
Select a portfolio you would like to make public and click "PUBLIC".
In the appeared window enter the cost of monthly subscription to your portfolio in the "Enter the cost of the subscription" field.
Agree with the terms by putting a tick in front of "Agree with terms". Click "Publish".
5 minutes later your portfolio will appear on the main page, "Market place", and will be available to everyone.