RMA has always been, send it back and they send you a new one. This isn't a new concept. While I understand the frustration of potentially losing money while it is RMA'd that is the nature of the beast and their hands are tied.
BFSB did advance RMA for me, in exchange for a bitcoin deposit. Went flawless, for both. This isn't a big thing to do, but extraordinary well received by customers, especially in the time-critical ASIC-Business.
To cherish the idea of bitcoin and one of its main advantages, fast transfer of values, it would be an easy win for both KNC and their customers to establish a comfortable RMA process.
RMA request -> bitcoin deposit -> delivery of replacement item -> return of faulty item -> reception and verification -> release deposit.
win-win, easy-easy
Send KnC and email with this information, explain how their competitor is doing business and maybe they will change.
However a 25GH bitfury module is a little less risky than a 130GH KnC Module.