The only difference between a secret service protectee and detainee is a phone call from potus.
Every move she makes, every breath she takes, they be watching her.
Hillary still has Secret Service staff .. primarily because when Bill was still President, he was able to choose that his family would remain under Secret Service until death.
To show the contrast, GW Bush only had SS staff for himself and his family for 5 years after leaving office. And .. the Bush’s retired to their ranch .. and enjoyed life.