A 'contributing developer' is an individual who has contributed in the last 90 days to software being scanned by SOOS. SOOS does not count contributions to public open source repositories.
If you have a paid subscription, the number of seats selected at purchase should reflect the number of contributing developers on your team. The maximum number of contributing developers you have performing scans using SOOS should not exceed the number of purchased seats.
As your team grows you can edit your subscription limits to add more seats for additional developers.
Note: A contributing developer is not necessarily the same as a user invited to the SOOS app. Many teams may have more developers contributing to the codebase than are accessing the app