When you install a "patched" IPA, you are installing code that has been modified by a third party. You are trusting that the person who patched the app did not inject malware, spyware, or adware into the binary.
This has driven a massive surge in demand for files. Modders and developers have taken the infrastructure provided by AMS1GN and combined it with decrypted, modified IPAs to create a more liberated user experience. ams1gn ipa patched
: Unlike public enterprise certificates that are frequently revoked by Apple, AmS1gn uses a device's unique identifier (UDID) to provide a more stable signing experience. When you install a "patched" IPA, you are