Service Account Access

Pleonasm

If you don't have a Service Account set up already, and all of your family members or team members are human (so to speak), then that switch won't make a difference.

The 1Password command-line interface (CLI) still needs all the usual sign-in details – email address, Secret Key, and account password – so is just as secure as signing in to 1Password.com or using the 1Password apps. The only distinction here is that Service Accounts can only work through the command-line interface, since they're essentially a kind of bot that you control to use on your own 1Password account.

Service Accounts also don't have the usual sign-in details of email address, Secret Key, and account password, but rely on a randomised token instead.

Long story short – that switch will only make any difference to functionality or privacy if, and only if, you're already using one or more Service Accounts. In all other cases, it will have no effect.