That's a strange business model. They are trying to corner the market on the data.
This leaves them open to competitors that just want to sell equipment, and let people have their own data.
That would be like Timex owning the data for a stopwatch. Or Stalker owning the radar readings.
If Trackman equipment is very expensive then the number of customers would be small. However, the number of customers willing to pay a small amount for the data (or better yet, subscribe to monthly access) could very well be huge and recurring. Many industries are moving to a subscription model for this reason. Timex watches are cheap enough that it would be more trouble to buy the data than to just buy the watch. On the other hand, there might be money to be made buying a Stalker and taking readings of pitches and exit speeds and selling the data to parents for a few bucks a pop...