Ads Manager There is no limit to the number of products you can sell but they will always be as a comment on the Home page or on your own page. Of course you will need to make your page available for users to see it.
However clicking on Ads Manager brings up a screen which details all of the ads you have previously posted. Starting a New Campaign shows the screen below. There are a number of attributes that need to be filled in. Take no notice of the Budget or Cost per click/view. The app allows payment for this so there may be a charge per click. You will earn points when you create comments, or comment on another user’s post or article. these points can be converted into dollars for you to use to buy ad space.