Tinfoil hats, much?
They want to log metrics on how often people fly, where they fly generally. This drives product improvements and also lobbies governments on the positive value of drone products. They want to log information about likely culprits if their products are used for harmful means, such as flying near a fire helicopter. This is also to lobby governments about the positive value of responsible drone manufacturers. Whenever they're silent they get the shaft in every legislature in the world; they gather every bit of data possible to counteract that, so they can continue making money.
Per this article, I would like to know more about how they determined the data payload to DJI, and specifically how they confirmed that DJI gets anything from the video or audio streams.