That is bullshit for those that have reflash already to spend another $645. I myself being one of them they said prior our original reflash would be credited.
I don't think it would've been a realistic expectation to have most or all your reflash amount refunded to you. Plus, development rumors have been floating about for the Si version of Kpro for months, years. It shouldn've been a dramatic surprise that they were planning on releasing one. It's not as though they were deceiving or forcing you into buying both.