The keyword string breaks down into a specific release tag used in online software distribution communities: Avid Pro Tools v2021.7.0 Legit AAX Unlock Only Internal - R2R .
For audio engineers and music producers working in the Avid Pro Tools ecosystem, the release of (often abbreviated within the audio community) represents a significant development in how third-party plugins are handled.
A cracked "onlyinternal" version gives you none of that. You are stuck with whatever bugs existed in July 2021 – and there were many. For example, Pro Tools 2021.7 had known issues with video engine stability and certain AAX plugins. Legitimate users got hotfixes; you wouldn't.