if you want free there's always https://rclone.org/

- to keep things affordable for those who can afford to buy only a few devices

- to extract as much money as possible from those who can afford to buy multiple devices

It’s a pricing strategy. That doesn’t have to reflect what it costs them at all, but ideally should match what it’s worth to the customer (if it doesn’t, they either leave money on the table or don’t get sales)