One problem, however, is that it is quite hard to reliably separate the "bought, brought home, tried on, did not fit (or other reason) like I thought, returned"

One problem, however, is that it is quite hard to reliably separate the "bought, brought home, tried on, did not fit (or other reason) like I thought, returned" actors from the "bought for 'event', wore to 'event' to impress, returned when 'event' was over" actors. Both exhibit a similar pattern from the retailers viewpoint: purchase, a few days delay, return.