2. No PSN or Game Updates. If you have jailbroken your PS3 it means no firmware updates for you and neither the game updates. The first one was obvious. Sony updates the PS3 firmware regularly to patch jailbreak vulnerabilities and unless you have the latest PS3 firmware you cannot sign in to PSN network.

Oh good I thought it was like PCs where you needed to like activate your games online before playing them, basically requiring an Internet connection to use your PS3. I'm one of the few people these days without Internet, but I still get along fine because I can easily walk down the street to use the internet whenever I want (Campus Computer Problems updating the PlayStation 3 system software Jul 20, 2017 3 Effective Ways to Fix PS3 Internet Connection Problems

How to play PS3 games downloaded from the Internet:

Can’t connect to Internet on PlayStation 3

PS3: System Freezes or Won't Start - PlayStation

Jan 19, 2017 How to improve your PS3 connection to the internet and Aug 24, 2011 Fixing Your PS3 Network Connection [Solved] - CCM Feb 17, 2019