I am sure ZOS is working hard to combat gold spam and it is hardly working. Before Friday's patch I had not received any gold spam mail but I had read about it. Since Friday's patch I am at no less than a half dozen gold spam mails daily.
Whatever it is devs are doing to combat gold spammers and bots, you are not doing it well or correctly.
Thus far we have: credit penalties, drop changes, timer additions to boss spawn, disabling whispers on occasion and other AI behaviours you have managed to use to isolate and punish your active paying player base with.
I can empathise with the difficulty in combatting bots and spammers and that you would be having added difficulty due to an obvious lack of ability within the coding department due to inexperience or manpower. However you are doing it wrong, it is getting worse and you are being beaten by automated services. If the game breaking/ progression stopping bugs and glitches and exploits and hacks were not enough to completely deplete the player base (as the lack of resubs indicated after month 1) this certainly is poaching all but the greatest of disillusioned fanboys.