Pirated versions cannot be updated through official channels. This leaves you stuck with a version that may have known security holes that developers have already fixed in the official release. Privacy Risks in Adult Content Piracy
For subscription sites, this might involve modified scripts or browser extensions that trick the server into thinking the user has an active account. Security Risks: ifeelmyself torrent patched
Using "patched" or cracked software from unverified sources poses significant risks to users: Pirated versions cannot be updated through official channels