You mentioned "R2R," which refers to a specific "scene" group known for reverse-engineering audio software. In the context of Kontakt, their work became famous for creating a "keygen" that emulates the Native Instruments license server or removes the need for it, allowing the software to run without purchase.
Technical Risks of Using Cracked Samplers: While the official software is stable, using modified versions carries specific risks, particularly with a complex sampler like Kontakt:
If you own any qualifying NI product (e.g., a cheap second-hand Maschine Mikro, or a Komplete Kontrol keyboard), you can upgrade to the full Kontakt for half price.
Splice currently offers Kontakt 7 on a rent-to-own basis. You pay approximately $9.99/month until the balance is cleared. This is cheaper than a Netflix subscription and gives you a legitimate license immediately.