Do what I'm going to doaasoror wrote: ↑ Yes it's not one per household, but beside Spotify Google is enforcing their own one per account restriction (which seems to also include trying to detect multiple accounts held by the same member). If you are using paypal for that second order and paypal sent the same credit card billing info (name and address) to Google as the confirmed address which matches the one you already used for your first order (being the same CC) that might trigger their fraud detection mechanism (similarly fraud detection might get triggered if the name/address paypal sent for the shipping wasn't a paypal confirmed address).
Ordered my own
-Going to sign my mother up and give her the $10 to her address
-Going to sign my father up and give him the $10 to her address
-Going to sign my gf up, but I think she may want one so she may keep it herself, if not, I'll give her the $10.
Keep 2, sell 1 (or 2)