For the first time, I see a HN thread on a startup I know very well from the inside, how can I resist jumping in.? :)
First, the OP is factually incorrect about one thing - True&Co doesn't have a subscription model. You get a bunch of bras in a box when you order from the site, you keep what you like. This is the same as the Warby Parker model as well as other successful startups where you need to physically experience things.
Second, I'm not sure why the OP feels such animosity towards the company or the team. There are many snide comments in there, especially around funding, which seems out of place.
Having said that, the women's intimates business has a few big incumbents and a huge addressable market. In the beginning, True&Co took a very 'software eats the world' approach and tried to use machine learning to fix a problem that a lot of women have.
I'm not sure whether they still use a algorithm or whether they focus on tech anymore but at the time, I liked the algorithm Aarthi and her team had built out - it had great results.