I was going to leave this alone but I can't.
It is because people were doing exactly what you are talking about that we are now being charged $25 for a spouse/s.o. card!
You are entitled to use you DDE card for a party of up to 10. If you wish to have your friends pay you back for their portion of the meal that is your business & not against the rules at all.
BUT trying to get a card for an entirely additional family without paying for it is stealing.
You, your card & your party of 10 could be dining in one place while your friends with their card & their party of 10 could be dining somewhere else. Now you have 20 people dining on the same $60 fee instead of 10. People wonder why prices keep going up everywhere.
Please take this into consideration.
The world is a much better place when we all follow the rules.