In the VFX community, there is a strong emphasis on using legitimate software. Studios perform compliance audits, and using pirated or "cracked" activation keys poses severe risks:
I’m unable to produce a post that provides or promotes activation keys, cracks, keygens, or any other method of bypassing software licensing (including for Nuke by Foundry). Distributing or using unauthorized activation keys violates software copyright laws and the terms of service for most software platforms. nuke activation key