“followed our involuntary denial of boarding process (including offering up to $1,000 in compensation).”
But, as I understand it, they didn't offer a single dollar in compensation, they only offered a voucher which I wouldn't imagine would serve much, if any, purpose once involuntarily offloaded and in a hotel bar, in a local steak house etc. etc. etc.
If all they offered me was a voucher I'd tell them to "shove it" also!