Farmers have always been exchanging data, but in the past these exchanges took place at the local grain elevator, after church, and at other physical locations.
There are many possible reasons your data might end up in someone else's hands--if your ag tech provider allows it. But it may not have a choice.
1. FOIA - Freedom of Information Act - if a gov't agency already has your data, they might disclose it further. 2. Subpoena and court orders. 3. State regulatory agencies looking for environmental violations. 4. USDA - wanting to verify acreage. 5. EPA - looking for Clean Water Act violations.