Ok, fuck you pangolinminer.
Now you let me add it to my cart, let me fill out the checkout page, and then tell me you don't have enough and to try again in 80 minutes?
Go suck a dick.
Hire a real web developer you bush league fools.
They are using WooCommerce. Based on how they have explained their ordering process previously, they most likely have it setup to hold stock for 80 minutes. This means if a bunch of people add items to their cart, it's going to hold stock and prevent others from ordering it. The actual inventory won't adjust until that hold time expires or the order is processed. If there's only 1 miner left in actual inventory, and someone pays before you do, you're simply out of luck because you didn't pay quick enough. They may also have WooCommerce configured to always show stock.
It's not a problem with their site. You just aren't quick enough. If you aren't on the site at the exact time they make them available and don't add to cart and checkout within a minute of release, chances are that you won't get one until held stock or another batch is released. I've been on the site at the exact times they've made them available and have been able to order just fine. First time I didn't even have to wait. Second time everything was gone in under a minute and I had to wait until held stock was released. Earlier batches sell out much faster. There's a lot of demand for miners, and everything everywhere, including used, has been selling out almost immediately. Check out eBay if you don't want to wait and don't mind paying 3-5x's more.
I understand what you are saying, and what you are saying makes sense - however, it does not change the fact that it is a shitty system. A REAL order system deducts from inventory when an item is placed in the cart. Said item is them returned to stock after x number of minutes if the purchase is not completed.
Their poorly designed piece of shit, while most likely working as intended, does not do this, and instead allows you to place items in your cart which are shown in stock, but aren't actually there.
Ergo, it's still a piece of shit.
I'm well aware of the demand for miners, this is not the first miner I've attempted to purchase. I've got a bunch of Bitmain stuff here already. Bitmain's website is far easier to deal with, slow though it may be. If the item gets into my cart, I can check out and pay for it without issue. None of this "it's in my cart, but now it's not available" or "Ok, I got it in my cart, now let me go to the next step of filling out there form before I get told it's not available".
Horseshit.