I read it but missed the connection.
I had to do a search and found link that says that Federal law exempts from minimum wage and overtime if it is purely for training and not to benefit of corporation.
In all intern positions there has to be value to the intern. The corp can benefit, greatly even, but the intern had better receive significant benefit in the way of training or experience. There is no established amount of benefit to either party, but this type of lawsuit can result if the corp simply uses the person as free labor.
Most companies I know are now paying interns $10/hour and not calling them “interns”. They call them something, anything, else to avoid this type of suit.