And don't forget that the larger sizes from vendors vary widely. A Ralph Lauren (black/purple) xl, xlb, xlt, 2xlt and 2xlb fit very different torso shapes and that's just one manufacturer.

Also, monthly auto-clothing deliveries implies a level of replacability for the profitable clothes that would lead me to think they'd look good for a limited amount of time and that quality fabrics and tailoring would be limited. Which then makes me think they're not targeting people with standards and taste so much as people who do not want to think about clothes and that wouldn't be something I'd want to use.