[tommusic]

I'd expect they use the data in aggregate to figure out what sizes of clothing to stock where to keep latency and transportation lower.

It doesn't seem that much of their variable cost would get shaved off by already having one's measurements, which makes me think this wouldn't help them with a lowest-price strategy. Maybe a higher-end market focus.

But as other have already said: body size data can be expected to expire often. I'm an edge case, but my weight has oscillated between 195 and 165 a few times in the last year.