Taking a look over here on my end, I can see that the promo you sent us is meant only for those looking to trade in an old standalone license version of 1Password for a new 1Password subscription. Therefore your existing account would not be eligible for the promotion.
With that being said, we understand times can be very tough right now, and because you have been such a loyal customer I have gone ahead and applied a $20 USD credit to your exiting 1Password Families account as a little thank you from us. You will see this credit reflected on your next invoice.
If you have any additional questions please feel free to contact me again!