Stop it: Fallout 76 tried to do this too

[Yencat]

You have to clearly label it as an introductory offer, though. Not a 'sale'.

The game thing is fine. You can offer discounted prices prior to launch. You have to mark it clearly, however.

Then by all means report it.

They did edit the listing today adding "This item was released to commemorate the 2023-2024 Fan Festival events. (* Updated 7/26/2023.)", I don't know if that's a way for them to get around it.