When I used PayPal to purchase the game, both the email and app showed both itch.io and the game name. As an added note, PayPal will only show itch.io on activity, but if someone other than yourself has access to your PayPal, they will be able to click on where it says Itch.io for more details, and it is there where they can see what you purchased on itch.io. So, I will consider making a different PayPal account to purchase if privacy is a concern.