Direct purchase ensures you get the latest updates.
If you want to experience GTA V without destroying your computer or risking your personal data, use these safe alternatives:
These files often contain trojans that can steal your personal information, passwords, and banking details, or lock your files and demand payment.
Claims of compression to 10GB are more common and represent a "repack." This is a compressed installer that shrinks the download size, but it must then expand to its full 65+GB size on your hard drive, a process that can take hours. However, a 10MB installer has no data to expand; it is, for all intents and purposes, an empty file.