Well, that is your choice of course but with the info in that article (particularly about the risks involved with giving your billing/credit card info to seamy places like these!) I know I would not. The ethics of purchasing shady software are another issue that would keep me away- another thread just last night talked about getting software from one of those places that did not work at all and them not honoring their so called money back guarantee.
Genuine Tiger installation disks with full packaging and documentation are available out there- though the law of supply and demand is kicking in and raising prices since they are an increasingly scarce commodity, but I personally would rather pay the price and be safe ordering a copy through a legitimate supplier that will stand behind the product.