Yes, employee rights lawyers do sometimes represent people on a contingency fee basis. That decision is based on a number of factors, including the potential value of the person's case (what are the possible and recoverable damages), what has happened or not happened already in the case (has anything been filed, where, when), how the person presents in person as a witness (are they empathetic, credible), and what are the strengths and weaknesses of the case (are their witnesses, documents that...