 1. team members only (to protect spam) and show `<UpgradeTeamsBadge />` 2. don't check the team members calendar for conflict checking, only invite them 3. if possible mark them as "optional":  <sub>[CAL-5091](https://linear.app/calcom/issue/CAL-5091/additional-settings-add-team-member-as-optional-guest)</sub>