Any punishment that isn't a fine, jail time, or community service is unusual by definition because those are the typical consequences. However, it is written into our laws that a judge may deviate from this norm if they feel it more suitable. So yes, a judge could interpret this as unusual, but I they have the legal freedom to decide it's not.
She was also given a choice so she isn't being forced into the "unusual" punishment. She chose it over conventional punishments.
Congress 🤯