...and even if they wanted to make AFK Neutral AH sniping against the rules did they really have to do it in a way that also make almost every addon against the rules and thus subject to GM whims?
It is incredibly frustrating when some people assume that anyone complaining about this is a butthurt Neutral AH sniper. I couldn't care less about the Neutral AH, they can delete it and its silly goblins for all I care. Good riddance. I care only about the API being safe to use for things that would be ok if done 100% manually. THAT'S IT!
And Bit is the maker of the best vanilla AH addon. Attacking him is silly. With rules as unclear in enforcement as this, he could easily get people permabanned by mistake given that, and this is true, there is no good way to buy items from a list in vanilla without using the scan-match-buy method.
The only real difference between the AUX buying method and the neutral AH snipers is that AUX requires an exact match rather than a price at or below a threshold. If anyone except the banned person has a 100% legit reason to be upset about this ban and its implications it is Bit.