Mac addresses.... come on. This is a laughable security feature. You realize the entire first half is the manufacture. There goes 1/2 of your entire security.
So by brute forcing last half just on major manufacture's mac's .... you will find chances are quite a few users mac's.
And how is it costly at all? Timely... maybe depending on how many you can do until security cuts it off.
Sigh, I don't know where your understanding level is at, read the article, MAC addresses are never going to be used for "Security" and stop making false security claim when you don't even understand a bit how it works.
If your using mac addresses for anything related to this coin its a stupid idea. Do you not agree the first half of mac is manufacture?
Guess what miners have common boards they all like .... this makes it where you can target specific groups pretty easy.