The NYC con variant and la mole covers haven't picked up heat because they aren't being pushed online as having low print runs.
The regular issue of Batman 35 sells for 10 to 15 bucks. To assert that the combopack wouldn't sell for more than 10 dollars if it had a high print run is absurd, because while it has nowhere near the print run that e-hucksters claim, it still is significantly lower than the regular first print cover, which means it would sell for more than the first print, especially if, as you claim, people are purchasing the book because they actually care about what is happening within the pages.
But look at the single digit Batman issues with combo pack variants. Most of the single issue Batman regular covers sell for at least 10 or 15, but their combo-packs don't sell regularly at 40 dollars or more, nor do they sell anywhere near as often as Batman 35 has done in just one week. Hell most of those early Batman combo packs have only one or two listings on eBay at any given time.
Arcane has sold 60 plus copies of the Batman 35 combo just through eBay since the end of January. That doesn't account for their in store sales or the sales through their own website. Knowng that you still want to defend the idea that the print run of the 35 combo-pack is in the hundreds? Nonsense.
Not defedning the print run for bats 35, i have mo idea what it is for the combo, i am however behind the idea that the reason it sells is because of jokers origin, which has never really been told before, to my knowledge, and also because it starts end game. I dont know about the rest of you, but this joker origin is insane, if it does stay cannon this book will surely appreciate over time. It gaved me chills reading all those, 35 to 39, batman issues, specially jokers "origin"