While it is not required that an OpenRounds member includes all of the information requested within the "My Account" tab, often times the OpenRounds team and host clubs can provide a stronger and more well-rounded experience with any additional information a member is willing to provide.
For example, club staff may suggest a certain set of course tees ahead of check-in to provide the best playing experience, should handicaps be known ahead of time.
OpenRounds does however require a valid name, email, and phone number in order to request a round, at minimum.