Originally Posted by
HalconBCN
Unlikely. That would be eligible for downgrade compensation, or alternatively they could wait till the next available flight with C class open and collect the compensation for a long delay.
No chance of EC261 downgrade compensation if OP agrees to be transported on that flight. They are free to choose to wait, though, that is correct, but again there's no way you'll be compensated when you could have gone out earlier.