[VeryVito]

One of the understood requirements of publishing an app on the App Store is that developers must provide some means for customers to contact them directly (support page, email address, etc). If you're selling apps on the app store, people can already peddle their wares to your email account.

So yeah, developer's names, addresses and emails are not secrets by any means. Why would anyone buy an app from someone they had no means of identifying?

[gurkendoktor]

iOS developers != App Store vendors. There are plenty of developers who work on other people's apps for a living.