Not sure if folks know it or not, but they updated the rules for starter accounts. This was in the 6.1 patch notes:
Accounts with an inactive subscription are now able to log in with the same restrictions that Starter Edition accounts have with the additional perk of being able to join guilds that characters on the account already are a member of.
Basically, you no longer have to have a "starter" account in order to play. You can now log into your regular account, it just has starter account restrictions with the additional perks listed in the 6.1 notes. It's hard to play with the restrictions (my hubby tried), but you can at least log in and chat from time to time.
Starter account details: https://us.battle.net/support/en/articl ... er-edition