Accepting an extension you are not required to accept helps ONLY the company. I'm not saying this was the case or targeting DT. However justifying this by saying you waived rest and made extra days of pay sitting on your sofa is HOPIng. I have heard this kind of justification on the line.."I made them pay twice to move the jet" blah blah blah. That's peanuts compared to the cost of a service failure that they should be tagged with for their speculative extension program that is contrary to our pathetic CBA.

Edit to add after DT's clarification: You don't have to accept an extension to DH. You can insist on a commercial ticket home. Sometimes it's unavoidable because there may not be commercial service available but if you have already made your own travel arrangements then you won't be there to insist they follow the contract and that hurts all of us.