I think haxxors does make hardware sales boost. Maybe not crazy but if we compare it to the Wii hacks we can get a general idea. The HBC had somewhere near 300,000 installs recorded - now that doesn't include untracked ones so lets estimate and say 500,000 were done as a high estimate. I know I would love to sell an additional 500,000 anythings and I'm sure Nintendo would as well.
There are some people who will not bother with the hardware/software regardless so their "piracy" as its called is not even relevant nor a part of this equation. They wouldn't have purchased software to begin with. I call it sharing, you call it piracy (I should probably get my flame shield out).
If me and my neighbor both buy a Wii and I buy not a single game but he lets me play any and all of his games at any given time, am I therefore a pirate? Or am I just sharing with a friend?