Free or cracked "full versions" often come bundled with intrusive advertising software that degrades device performance.

When looking closely at the keyword "youjiliz," it usually represents a typo or a misremembered name for one of two completely different categories of platforms:

If a promised "full version mega-pack" downloads as a 2MB .exe or .msi file, it is almost certainly a malware downloader. Real asset packs are massive.