How many project team members can be added to a project?

Summary: Is there a limit on how many team members can be loaded to a project?

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We are using Projects and OTL module and enabled the project team member only access checkbox in OTL to control who can see project in their OTL. Some Opex projects are enterprise wide and should be accessible to all employees which are around 10000 in number. Can we add 10000 or more Project team members on a few projects? We will be utilizing the REST services to add or maintain the team member's list.

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