I understand that I am entitled to free SDC as a PM. Does this extend to everyone who is on the same reservation, or would my non-status companions be required to pay the $50?

If we have 4 pax on our reservation, will we only see SDC options that have 4 seats available, or might I be able to switch 2 onto one flight and two onto another?

Sorry if the answers are already out there -- I did a search and can't find these specific issues addressed.