Originally Posted by
dshides
According to a few GA's I have talked to in the past, they do not have the leverage to assign you a BE ticket on a partner (KLM, AF) in the event of your original flight being oversold. This was told to me while they were offering $400 for the bump and confirmed BE for the next flight in the morning on a DL flight. Whether this is true or not, I am not sure but I was happy to take the voucher and confirmed BE

Yes I've since learned the same. You need to have a similar class ticket on partner airline to get transferred.