I have noticed that data upload totals depend on where I drive. For example, I live in the Dallas area and after getting 10.69.25, I drove about an hour through some rural towns. Later that day, my car uploaded about 4 GB total. Two days later, I drove about an hour in the Dallas metroplex. Virtually no data was uploaded.
It's very likely that cars are tasked to upload based on where they drive and/or what situations they encounter. If you are driving roads that are frequented by Teslas, then there's probably already data for whatever your car encounters. But drive out where few Teslas venture and you may collect some useful stuff.