Which company has a good file hosting service. In other words, once a person pays for my game, they can download immediately.
The plan I had for that was to use my website. I developed a secure environment where no one could arbitrarily download ANYTHING without being on the site and logged in. I even have that security built into the web apps that run in them. All financial transactions are handled through PayPal. All you have to do is send a request when they return from PayPal asking if the transaction was approved.