May I suggest providing a base system that handles all of scouting for a team. If you are willing to make the system simple, fast, and accurate (Really high quality, enough for a team to want to pay money for it) that doesnt depend on other teams input, you can get somewhere. By default, include an option to send all collected data anonymously (some teams put very "personal comments" in their scouting reports... its not nice to find them on the ground
) to a centralized collection point. Teams who would want to utilize the global data could view the submitted sets on their own (but unlike as you said, make it so that the data is NOT combined all at once, instead make it so bias can be viewed easily and assessed).
1. Make a product that everyone wants (teams will be willing to help).
2. Submit that data collected (anonymously)
3. Allow teams to re download the data in a set-chunk form. Either info can be viewed by collection or by team, or by both