Many repacks use "offline" accounts. However, if you ever try to connect to a public server like Hypixel or Mineplex (using a cracked server proxy), the server anti-cheat might flag you. Worse, if you sign into your real Microsoft account on a cracked launcher to access your purchased skins, Microsoft will your account.
: Repacks significantly reduce file sizes (e.g., from 60GB to 15-30GB for AAA titles) using advanced algorithms, which saves download time and data. minecraft java para pc repack