Can i add more than 5 users on a family plan

@Sakari

Sure, it will be billed at the additional user rate of $1.00 per month per user as of this writing.

https://1password.com/families/ * In the FAQ, the billing rate is listed for users above five in a family.
https://support.1password.com/membership-billing-policy/#invite-people-to-a-family-or-team-at-any-time