I would argue that the predominant reason to choose One Medical for primary care would be the value added services included with the $199/yr fee.
It's COMPLETELY optional. If you want to see a doctor there via insurance, paying a co-pay, you are not obligated to pay the annual fee.
Depends on the insurance company's contract with the provider. It is generally optional, though they will tell you otherwise. I would still pay it though. I feel like it is a good value and I want to maintain a good relationship the the doctor and their office.