ISD’'s are volunteers for a private for profit corporations public forum. They are not paid, yet.
But as Uber & a bunch of other corporations found out lately just because you do not consider a person to be working for you does not mean in the eyes of the law they were not, no matter how much toilet role you made them sign or for lack of employment contract.
I suspect isd could in fact, be employees of CCP & probably owed sums for their labour. Why anyone would volunteer at a for profit Ltd. C is beyond me.
Why any H.R department for a profit organisation would sign off on unpaid workers is also beyond me, the liability nowadays is enormous.