Beauty Detective is keeping a tally. As of today she's listed 297 BACs on the market. Even 10% of that is approx 29 calendars so I do dispute anyone is buying anything and everything.
There's definitely a collective fomo at play but we're all adults and ultimately the decisions are ours. Criticisms of buying too much are valid but I think we all know all of it is a want not a need. If there comes a time when these threads are too much or they make me unhappy for whatever reason then I'll step away.
I like chatting with others whether they've bought one or ten and nobody here as far as I can tell buys purely to sell on. Selling on or passing on the bits they don't want I don't see as an issue. I'm very happy to have picked up a few bits on Vinted.
I'm struggling to see how the thread would work as you hope it to be @owlpassport all the BACs release at different times. Some sell out fast and you have to be quick. We don't always get all the information we want months in advance to ponder deeply.
Pricing is dynamic - the £69 discount on Niche Beauty for example is new information. I wouldn't buy it full price but now I'm considering it in light of that even though I've bought others. I actually would have bought this one over Harrods at this reduced price but Harrods was going to sell out and I made a choice at the time based on that information. I may or may not buy another one. I know I don't need another but I don't see why it should matter to anyone else on the thread.