The marketplaces where you can find / duplicate / purchase automations made by other legal professionals are known as "Communities." If you choose to publish your automation, you must publish it under a Community.
Anyone can create a Community marketplace.
Go the Communities tab of your Afterpattern account:
Click "Start a community" and design your marketplace. Is it public or private? How can others join? Is there a fee?
After you create a Community, you can invite members either under the Community settings or directly from this menu: