If interested in being paid to not fly, I never ask before they offer an amount I am willing to accept. In my opinion it makes the agent less willing to go higher. And as I am now in posession of a voucher Frontier gave me that never had the stated value, I would not trust the airline enough to volunteer for a voucher until my matter is settled, and it has been about a month.
I do not think the person on those chats, or at the ticket counter are well informed, and so I do not think they intentionally deceive. They simply do not know themselves. I doubt that the majority of employees at Frontier know what is going on until it is finished. I had a cancelled flight and I knew because I was looking at the board in the airport when it went from ontime to cancelled. The airport folks for Frontier did not know it was cancelled. If like you, I was told 6 hours earlier, and did not appear at the airport, I would not have known what was happening. About twenty minutes later I received an email verification and I used that email to rebook my flight options. The majority of the other passengers got into a long line at the ticket counter to be told they had to use the email, and goodby/good luck. With Frontier, a savy flier saves alot of money, but these are the burdens that come along with it, although I am in a spat with Delta and now I do not think Delta is so great anymore. And United- I wouldn't get on that airline until they go back to hiring pilots based on experience.