Essentially, everything available will be up on the site in advance, then it will disappear as the drop time gets closer (helps to bookmark the page of the ones you are interested in in advance, or keep the tabs open to refresh later again) as soon as the drop goes live everything will appear again, technically one by one, so things will disappear as they appear if you know what I mean... Depending on how people are ordering trying to get stuff through the drop etc. Once someone adds it to their cart, it becomes unavailable for anyone else to do so, for about 4 minutes? If multiple try it once, it should go to the first, fastest, internet connections etc... If they fail to check out, then after the timer is up the unit will become available again for someone else to try the same way... You can only get one in your cart I think and check out, however the checkout, does not mean paying yet... You wait after check out to see if you get confirmation email of your order, then you would be paying after that, so you do have plenty of time to decide on accessories and add things to order, there is a code for doing so so you don't have to pay shipping multiple times etc. Any mistakes can be refunded though, helps to test check out since international purchases can get flagged by credit cards etc slowing you down further... Potentially! (the last drops that I was in, I actually chose to pay by bank transfer instead of credit card, in which case you always pay later after once the total is clarified and order locked in, so that can prevent any potential credit card issues, but now since you don't need to pay right away for the BAK you secure that should not really be much of an issue during drop anymore?)
No they have been single device drops for the past while, easier for him to focus on one batch of one vap, so we will see a separate drop for various tetra later on...