Google App Engine for Businesses Source License

I believe I read that if you wanted to use Google's App Engine, your application needed to be open source. With the recent announcement of App Engine for Business, does the same rule 开发者_开发问答apply? I would like to host an application on this particular platform but have no interest in releasing the code initially (down the road, potentially).

I never heard of this requirement. I know many companies are already deploying proprietary applications on GAE.

The App Engine for Business thing is, to me, just marketing. It was already possible to build proprietary/business applications on GAE, but they are now offering a number of additional services, useful for business users, and called it App Engine for Business for the announcement/marketing effect.

I think you might have confused Google App Engine with Google Code. Currently, Google Code only hosts open source projects.