On my server, we have a few choice individuals and their FC and linkshell who are blacklisted from other linkshells because of pulling early.
And yet when these guys are on, they're first to the S ranks to pull, and a lot of A ranks if they actually choose to go to them.
Part of it is there's pros in their group that know the tricks to spawning S ranks, but also I think they're using the addon that is technicly illegal.
And yet people still use it, and there's no idea how much, or if there's actual banning as a result of using this client.
The question then becomes, do you want to risk your game account on the off chance SE figures out you have this, and bans you, or do you want to get to the A/S ranks in time to kill them?