It’s a review grift.
They create an account, use a random address (yours) order their own product and ship an empty product, then review it as 5 stars which shows up as a real fulfilled order.
Back in the day you’d at least get the shitty item for free, but now they’re just empty packages.
Even if not shipped from an Amazon warehouse, it comes with an Amazon envelope and tracking number.
Because they used your address when they picked a random one, and had to trigger tracking that it was delivered, you end up with an empty envelope.
If they didn’t send the envelope, tracking would show it was never delivered.
The whole process is designed to trick Amazon, they don’t care about who gets the empty envelope.