3060 ti from earlier today has gone through! Thanks for the tips everyone
Joined the telegram a couple week ago, and since then I've kept an Nvidia store tab open at pretty much all times I've been at my computer (which has been even more than usual recently because of Covid). Just spammed refresh on the tab as soon as I got the notification on my phone and after a couple tries they all showed up as in stock. Once it was added to cart it seems like you had a lot of time to checkout, the site took absolutely ages to load and at one point there was some error that emptied my basket, but luckily going back a few pages brought it back.
The first few refreshes still showed it as sold out, so not sure if it takes a bit longer for the site to update depending on which part of the country you're in, or if that was their bot detection kicking in and putting botted cards back into the pool for real people to buy. It's probably worth refreshing for a fair few minutes though even if it shows as sold out at first.