Also, Victoria's Secret doesn't do 3/$100 bra sales.
This, at most, is a Telsa 3, priced pretending that it plays in a Ferrari leagues. Musk may say so and so may Tesla fan boys, but even Musk is not pricing Tesla 3 at at $150K. If it is priced at $80, it would work for long enough for them to outsource manufacturing to China, India and Vietnam, which means that the $10 knock offs would be everywhere in 5 months [VS knock offs are in every Chinatown/Koreatown of every US city sold for 1/10th of VS prices. Half of them are probably made at the same factories that make VS originals].
VS certainly does 3 for a hundred if not more during the semi annual sales. The winter one is about to start now.
If they have a better multidimensional fit model that actually provides better value, and they can get word of mouth on that to get people in the door, they can get away with less boutique treatment the same way that Tesla can get away with less fit and finish than other similarly priced luxury cars.
Just because they are in the same price range in the same broad descriptive category doesn't mean they are selling the same thing.
[2015 pricing] https://www.bustle.com/articles/110110-how-much-should-bras-...
[2018 pricing] https://www.businessinsider.com/best-bra
Women do not buy bras at VS for a list price. They buy them on sale. 3 for $100. That's the price and that's the problem that VS has.
Source: filings of LBrands, firings of the CEO, LBrands missing the train of bralettes.