Originally Posted by
dtwtransport
Recent experience here:
I was flying on a miles/award ticket this past weekend and scored a $1,000 voucher (in AA voucher dollars, not miles) due to an oversell situation out of ORD.
Voluntary or involuntary, though?
OP is specifically asking about IDB. There is no negotiation there; the DOT rules say how much you get.
Of course for voluntary, it's whatever you negotiate, and whether your ticket was cash or miles is irrelevant.