Aah that question always opens a kettle of fish lol
Officially they would not be free on any plan as SW says you should syn free foods if they are used as a substitute for flour.
That is to protect your losses. Normally you would have smash as part of a meal with lotf of other free and superfree foods to help fill you up. But as scones you eat it as an extra over and above your meals and it would be easy to consume a lot of calories without really realising it.
That's the official sw line but it is up to you what you choose to do. Some people choose not to syn them.