I am your contributor. Can I promote my works through Pinterest?
Sure. Use your Adobe Public Portfolio address. You can find the link on your dashboard.
As an FIY, this is a user-to-user forum. We don't work for Adobe.
As an Adobe Stock Contributor, you have access to a free Adobe Portfolio website from which you can sell Stock Collection images. See more about that below.
As Adobe's stock contributor, you are free to use your assets as you think is good for you.