went to redeem, I found that it is required to use a Google email for the master account.

I can understand needing the account to connect to Google's ecosystem, but do you ever plan to enable a separate login with the ability to connect our account to Google with an integration setting?

I currently use an email group/distribution list for all my tools because I've found using my main email floods my inbox with marketing/sales messages.

Having the ability to login to your account with a different email and then integrate Google with an authorization in your app would be a great feature for those like me wanting to create some separation.