This article gives a more in depth look at the differences between Subscribers vs. Contributors.
Add users to a Project Directory
Contributors can create a Project Directory, but they cannot invite anyone to the Project.
Only the Contributors can see who they have added to their Project Directory.
Share Groups
As a Subscriber, you can share to any share group listed on your project.
Contributors can only share to share groups if there is a subscribed user in it. That user also has to be from the Business the the contributor Business is directly connected to.
Contributors cannot share to a share group that is occupied by all external contributors.
Sharing
Subscribers can use the share to all feature in ProjectTeam while Contributors cannot.
Share all will allow you to share with all users and or share groups, that are currently on the project.
View forms "as of"
Unlike Subscribers, Contributors do not have the ability to view forms/documents "as of" a previous date and/or time.
Subscribers can click into a form, and choose the option to view the form "as of" a previous day or a previous time on the same day.
Action Items
Subscribers have the ability to assign action items to anyone on the project that already has access to the related form.
Contributors can only assign action items to users from their Business and from the Business that invited them to the project.
Contributors cannot assign Action Items to users from other Contributor Businesses.
