The "loyalty" part of it is what is making me laugh so much. Reading over at the us.playstation.com forums, there are so many hilarious posts from people who are getting so upset over the fact that they didn't get the $10 credit. A good number are trying to hide their anger over the $10 by stating that they are upset that they aren't considered "loyal". When you step back and look at it, it's really quite humorous. Especially since nobody even is trying to think about the fact that the text in this message appears to be the same as that in any other "free credit" giveaway messages that I've ever seen from Sony.
I'd have to dig through the forums here to find the thread regarding the giveaways when the PSN went offline and then came back online a while ago, but I believe that a similar if not exactly the same message went out with those giveaways. Therefore, this appears to be their standard text for any of the giveaways they've given.
The entire "They didn't say I was loyal, so therefore, they're saying I'm not loyal" argument is akin to saying that Sony is calling me a thief because they didn't send me a message telling me that I'm not a thief.
This appears to have been a random giveaway folks, using standard giveaway message text.