i know of many shops with the same policy. when the fabric is torn it stays on grain, you get a much straighter edge than when it is cut. i have one lqs that cuts...with scissors (absolutely refuses to use a rotary cutter even though she has a cutting mat on the table) and it is normal for the cut to be so far off...crooked that when you square up you loose up to 3" of fabric. it really is a savings to have the fabric torn instead of cut, then if you prewash and trim you only have to trim a sliver instead of inches. i know looking at it the fabric seems ...wonky...but it tears straight on the grain line. if you visit design houses and mills you will find they ALWAYS tear large pieces of fabric. it's really the only way to ensure you have a straight edge, cutting you cut across grain lines...which is why it frays when you wash it.