It kiiiiiiiiiinda weirds me out to see how many people's idea of morality is influenced by the exchange of little green pieces of paper.
No one died? No one was injured? No one was put under severe emotional duress for purely selfish motives? People were made happy? Life became easier? It didn't break (given religion)'s (given commandment)s? It enabled 
treat thy neighbor as thyself?
Legality is a different ball of wax entirely. But morality? No, I really don't think that's tied up in an economic transaction in the slightest. I have no 
moral responsibility to permit or encourage a given business or economic model. 
In fact, according to several big deal world religions, business is rather inherently evil to begin with, concerned as it is with the root of all evil. There's circles of Hell for those with suits and ties, and for and bean-counters, and for both the greedy and the wasteful. Camels don't frequently pass through the eyes of needles, and prophets were known to hang out with bupkiss in the desert pretty much all the time, and to say that we should all live like that.
I grok the whole 
Protestant Ethic idea (I'm a student of religion and culture, after all -- and if you don't quite grok it, it's a really enlightening read), but I can't bring myself to consider anything I give to my bank and wrest from the iron grip of my employers as anything having to do in even the littlest bit with whether I am a Good Person or a Bad Person.
So, no, I don't think it's my moral responsibility, or anyone else's, to pay. Indeed, if it would alleviate suffering or cause joy, I think it would be my moral responsibility to 
give, as much as humanly possible. 
But, being a student of culture and religion, with an eye toward economics, it's really fascinating to see how deeply the idea that the difference between 

 and 

 is $ has become. 
Though I can't help but think certain moral figures would go all 
moneylenders in the temple on it.
But a lot of this is beyond the scope of ENWorld.
How it relates to WotC, piracy, and the DDI? No, I really don't think it is immoral to engage in piracy, or to share a DDI account. And I think it's really sad when people confuse legality with morality.
And, just in case the thread exceeds its scope...IB4TL. 
