SYMPTOM:
The "Save" and "Save As" options are grayed out when trying to save the Intelligent Cube which is published via Data Import in Strategy Developer 9.x and 10.x, as shown below:

EXPLANATION:
It is an expected behavior.
When editing an Intelligent Cube which is published via Data Import, by default the Intelligent Cube Editor is opened in Read Only mode, any modification performed on top of the Intelligent Cube could not be saved.
Refer to below technical note for the best practices for Data Import: