walmart probably gets them.
in all seriousness, unfortunately there can in fact be lots of waste...those people lucky enough to live near fabric manufacturers or designers can really make out well! so much is simply tossed in the dumpster! it is sometimes possible to contact these places and get permission to (dumpster-dive) it is not always the case, but too often some places do find a way to make money for every bit, either selling it as seconds/flawed goods to discount stores or to 'sweat-shops' making inexpensive clothes/items with flawed fabrics. but some of the larger companies do not waste their time (you know the big corporate world is notorious for wasting! much better to toss it than to offer it to someone who could use it.)in new york you can salvage thousands of dollars worth of fabrics every single day!it is probably true in any large city with textile mills, fabric manufacturers or designers. home dec companies toss out lots too.