I was thinking more of those in leadership positions. How can someone who served and labored for a Greenskin under the mere threat of, well, dying to a Greenskin, still lead a Clan, Guild or Throng without feeling that only Slayerdom (preferably against Greenskin) can restore his honor?
I guess imprisonment and ransom is easier. It's a simple numerical life debt and the freed person will of their own free will labor until the following two happen: 1) They have repayed every penny of what was paid to free them and b) they have ensured that as much money gets expropriated from the Orc Clan in question as they unduly forced the Dwarf's kin to pay.