Where is the boundary of applicability of the phrase about open source in the VS Community license?

Question

Licenses for software and other works

Phrase: "Any number of your users may use this software to develop and test applications released under Open Source Initiative (OSI) approved open source software licenses."

Let's say the MIT license will be used, as the simplest of the valid ones.

1. Does the phrase recommend development of software within the organization to the first working version (with the addition of the MIT license by the first commit in a private repository)
2. Does the phrase correspond to the further development of software that is created and used exclusively internally under the MIT license.
3. Does the phrase correspond to the development of software that is sold by an organization under the MIT license?
4. Does the phrase correspond to the development of software that is sold by the organization in two versions - under the MIT license and under a proprietary license?

PS Inspired by another situation encountered on the Internet, when someone inside a large organization, not related to software development, wants to write some simple applications with a graphical interface to simplify their work duties, but does not know if it is possible, and cannot find the answer .