I know someone who changed school from Rheinland-Pfalz across the river to Mannheim (Baden-Württemberg) and got their Abitur essentially for free - at a privat

I know someone who changed school from Rheinland-Pfalz across the river to Mannheim (Baden-Württemberg) and got their Abitur essentially for free - at a private school well known for making everyone pass. So what does that tell us?