Did you do any research at all?
It’s fbs model. They made it free as a PR move. If youre actually worried about it phoning home, you could easily monitor the traffic leaving your PC and see if it’s collecting data.
It’s facebook, they pay their staff with the astronomical amount of money they have. This is a simpler model, and their goal is to look like the good guy by making this one free, and selling later ones like all the other AI companies are doing. Except FB has fuck you money.
Finger paint in blood (your own ideally)