If you are a hobbyist looking to fix a single old phone, you might find success, but you risk infecting your computer. For professional technicians, using a crack is highly discouraged as it can "brick" (permanently break) a customer's device.
However, calling these cracked versions "exclusive" is misleading. They are often found across dozens of file-sharing sites and are generally modified (or "patched") versions of older, less stable software builds. In practice, "exclusive" likely refers to the small group of crackers who know how to bypass the tool's protection, or to a version that a particular forum user claims to be a unique find.