Xbox – Do I keep the game progress even if I don’t pay for Xbox Live Gold

According to Microsoft, Yes.

To do so, you need to add the secondary accounts to the same console as the primary account holder. You then "activate" them into the Family Pack. After that, you can recover those accounts onto different consoles, and etc.

Its like using the same account on two xbox. You can't do it.

Now there are obvious reasons why Microsoft doesn't want you to be able to use the same account more than once (which are compounded by DLC), but the bottom line is: you can only be logged into the same account in one location at a time.

Now you might want to consider the new Family Pack, which is coming soon. Or streaming your Netflix to a PC.

The short answer though, is: No