Trust me, that will not work. Everybody did that early on when Diancie and AZ Floette were removed. As you can see, Diancie didn't come back until the event was about to launch in real life, and AZ Floette is nowhere to be found. Not to mention all of the other stuff that people have decided to generate mass e-mail campaigns for. Datel will add codes when Datel decides to do it, and so far there has been nothing that has changed that. In their eyes, all of the hype of these "campaigns" are great for business as all it does is draw attention to their product (much like you have scores of people outside of Japan going bonkers over Cyber Gadget.) The only reason why Datel probably even added IV modifiers is to steal some of that thunder back and get people talking about them instead of Cyber Gadget for a change.
People can always decide to take down their server XD