Originally posted by Vince
Reason they are all getting banned? When you login to your account or take a CFW ps3 online, their servers send a check out to your ps3 to check which FW it is on. They do this to see if you are on the latest FW to sign onto SEN. Now when you sign on with CFW, you are using older keys to access their servers. This flags your ps3 and basically reports it to be banned from their service. THIS IS NOT A MAC ADDRESS BAN! There is a "hidden" serial number within the packets being sent between your ps3 and their servers. They ban that serial number that is encrypted within those packets. Hence why you can not unban with a simple mac address change.
you are totally wrong there is nothing doing with what keys a firmware has.Sony cannot blacklist any keys because older games and multiplayer will stop working the moment Sony does that.A ps3 can sign into psn at any time with any firmware as long as the passphrase of accessing psn on higher/current firmware is known.
Sony banned users mostly who cheated online or were playing pirated black ops2 for the later scans your internal hdd and reports the folder structure to treyarch who in turn sends the data to Sony.