Depends what you consider prostitution i suppose.
Prostituion is the act of selling your body for sexual pleasures.
Now she is selling her body for sexual pleasures since the guys are getting off and most likely beating off too her.
Is it as bad as normal prostitution? No I mean shes not getting fucked and possibly getting STD's etc.
But it still must feel degrading knowing weird ass guys are watching her and telling her what to do. Also if she gets a freaky one that somehow contacts her etc.
I would assume that pays a lot though, if not then she should just go to a strip club and make more money there.
It's tough though, people who dont need the cash from the government usually get it while people like her will be told to just get a job.