Before downloading any software claiming to be a "tweak" or "mod," check its reputation on sites like ScamAdviser or search for community feedback on Reddit to ensure you aren't falling for a scam. Ultimate Tweaks Reviews | 2 of 4 - Trustpilot
Apple provides Enterprise certificates to large organizations for the internal distribution of apps, bypassing the App Store. MyTweaksVIP and similar services acquire these certificates—often through shell companies or gray-market sales—and use them to sign third-party apps. When a user downloads an app from MyTweaksVIP, they are essentially installing an app masquerading as an internal tool for a corporation. This is the primary mechanism that allows the "full" functionality of the store without jailbreaking.