A Year? Really? a year? thats what... 180$ of sub fees... Sorry... thats not shit.. and your 1 year and 50$ wont cover the bad press from your 'amnesty' program... the word itself leaves a bad taste in many mouths as it excuses inexcusable behavior and it mocks the shit out of those that followed the damn rules.
assuming IF I were to sign onto this plan of yours... I'd say 5 yrs no nothing... not even someone /report ing you for anything... $500 fine... 1 year pre-paid time in advance... AND strip everything off the account in question... gold, mounts, gear, achievements, EVERYTHING. Have to make it financially worthwhile for Blizzard to take this risk... then of course you have to cover the cost of the bad PR over letting botters, gold sellers and shit back into the game.