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.
That's not answering the actual question though, which was why you think it is the job of your exchange to keep this coin's network 'secure', as opposed to the coin network expected to simply be secure by default. If a coin's network cannot be secure through its own operation then you should not be offering it for trade.
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".
Again, that's not the question I asked. I wanted to know how your exchange holding a 'Prime Controller', as opposed to a regular wallet, contributes to keeping the XPY network secure. There may be a legitimate technical reason for the existence of the coin-pooping controllers other than to poop coins, if there is, by all means enlighten us.
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.
And finally, again, this isn't what I said. Even Adam Matlack stated that your exchange holding a 'Prime Controller' lends XPY credibility. He actually said that on record. So why would you choose to risk your public image in order to lend this fraudulent coin project crediblity which could lead to people mistakenly believing your involvement in XPY makes it a worthy investment?