If Imperial Honour is anything derived from the Roman concept.
Honour is the flipside of shame
Honour is how other perceive you in meeting your obligations to society, vs being Shamed when you fail to live up to societies expectations.
It can be lost though shameful actions, but it can also be regained though action as well.
Those without honour are thus shunned, lose their connections and favour with their Patrons, and see their clients abandon them for another, hence the propensity to take drastic action to regain ones honour.
Being in charge of ones own fate, being the active agent, rather than the passive object, was a key part of Roman honour
As seen in the Patronage system, a client only stay with their patron as it was mutually beneficial, if it was not the relationship would break down, as they were both expected to be free and active agents, just co-aligned in their objectives.
A client too submissive would be considered shameful, just as a too domineering patron would lose face if their clients deserted them for a better option.
To the Key point of all discussions of Imperial honour in ED
Debt is a loss of the ability to be in control of owns onw destiny, to be less of a person, and thus to have lost honour as it is shameful to be at the whim of others.
Selling ones self into slavery to regain ones honour, does so, as you are taking control of your own destiny, by becoming a salve.
That may sound like a contradiction, but it is about being the one who makes the choice, and accepting the consequence, rather than being the [passive agent acted up.
A Modern example might be the common saying "You cannot fire me, I quit"
Both leave you without a job, but rather than being fired by someone else, the passive object, You quit, you are the active agent.
The other option to preserve one's honours and show they until the end you are in charge of your own fate, is not suitable for age rating o this forum, but I am sure it can be inferred by until the very end.