A digital purchase is often the purchase of a license to download and execute the product. If that's the contract, then it is necessary to keep some PI on file

A digital purchase is often the purchase of a license to download and execute the product. If that's the contract, then it is necessary to keep some PI on file in order to respect the terms of the contract: offer a download upon request to a particular person. No need to keep PI on file indefinitely: the purchaser is enabled to take their wares and the store to remove accounts if dealing with PI laws is too much hassle. If this is too much hassle, they could instead sell a license to execute the software, regardless of how it is obtained (but offering a way to download for now, putting the purchaser in charge of backing up those files). Similar to what GOG are doing. But no, that's not enough control for them either. They want to have their cake and eat it too.