@silberspur That's a great question! The second paper I linked (by Bassa, Hainaut and Galadí-Enríquez) argues that intact satellites aren't the problem where diffuse night sky brightness is concerned. The smallest particles are the biggest contributor. If there were no small particles and only large satellites, the effect would be ~1% at most. But it could be considerably worse than 10% if, as Oli Hainaut said in presenting this work, the satellites"grind themselves into dust".