Haha, no, no sales. Making clothes to fit one specific person is an relatively easy task. Making clothes to fit distant internet strangers is much, much harder; and wouldn't pay as well as making software, anyway.
Even the US startups that are making clothes to customized measurements, etc, are forced to stay price-competitive by using the same overseas factories that (in addition to the specific kinds of inflexibility I bring up in the post) are often labor rights disasters, which is part of why I make my own clothes in the first place.
If I had a clear plan of attack against fast fashion, I'd probably take it, but the best I have right now is individual action.