Randy,
all 5 members of my family are devout DL fliers. By the end of the year, we'll have a GM and 2 or 3 SM's.
When I registered for SSM and added my voice to the effort, I also tried to add all the rest of my family members. Could not do it. Thus, extra 4 SkyMiles members, and close to 500K miles have not been counted.
Pls remove the restriction! There must be more cases like mine.
Regards;
MileJunkie