In agile, there is an emphasis on customer involvement. They provide user stories, provide feedback, and a lot of decisions are up to them.

There are situations that there is no customer for the software at the time of development. If we are going to ship a game -a software that people will be its customers after shipment- or if we are going to create a new service -like a new social network- and we are going to own it, there won't be any client present at the time of development.

I have a few questions for these environments:

1. Is there any software development methodology/framework specially designed for such cases?
2. Is agile applicable to such environments? If yes, How?

In agile, there is an emphasis on customer involvement. They provide user stories, provide feedback, and a lot of decisions are up to them.

There are situations that there is no customer for the software at the time of development. If we are going to ship a game -a software that people will be its customers after shipment- or if we are going to create a new service -like a new social network- and we are going to own it, there won't be any client present at the time of development.

I have a few questions for these environments:

1. Is there any software development methodology/framework specially designed for such cases?
2. Is agile applicable to such environments? If yes, How?

Update: It would be much interesting to know about a similar project developed agile.