1. Why do you think it is the job of your exchange to keep this coin's network 'secure', as opposed to any other coin?
If you really think about it exchanges already do this on every other PoS coin in many cases well more than 51%. This is true for Cryptsy on numerous coins, BTC-e and Bittrex probably one or two others do the same. Did I mention we all talk? If you read my post history you will find numerous statements on that topic.
2. What does your exchange owning 1, 2, or even 3 'Prime Controllers' have to do with keeping this coin's network 'secure'?
Obviously we have an interest in ensuring the network is stable to avoid "issues".
3. Why is it worth more to your fully-licensed and legitimate exchange to associate itself with this altcoin even more at this time, thereby lending it a degree of credibility it does not warrant and risking your entire operation and client funds being seized by an alphabet agency deciding that you're worth investigating further due to your unusual decision to associate with Garza back in October and since?
We don't back Garza never have. The selection of XPY is no different than the zillion other coins selection.
XPY is still substantially Garzacoin. He still controls a lot of coins. Do you have any idea how many coins are controlled by Garza?