1) Is it possible to delete a product completely?
Not currently. You have to request it and we'll delete it for you.
2) If a product is deleted, what happens to the product keys?
You have to delete them first.
2a) What happens to software that is already activated?
After X days, when you app re-verifies with the servers, then customers will become deactivated.
2b) What happens if someone tries to activate the software with an key for a deleted product?
They won't be able to.
3) Will the product be archived or will it be deleted permanently and all data is lost?
All the data is lost. Hence us not letting customers do it just yet. Not until we make a less "permanent" deletion system for products.