Well I suppose you could gather up all the NPD information you could find and put it up together on a site but if you didn't pay NPD for that information they could still sue.
Now they're probably not going to do anything if you only have a few small lists up but as your lists get more comprehensive, full of NPD numbers past and present, it would be completely up to NPD's discretion on when they feel like shutting you down.
This is one of the problems in the videogames industry, there is no de facto source of game sales information, and what information is out there is controlled by the one group that actively tries to collect it, NPD.
This is also why the simExchange is so interesting and exciting, together we are using all our collective knowledge and insight to get to a number and closer to the truth. As more people become active and participate on SE the predictions should also become more accurate.
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Now they're probably not going to do anything if you only have a few small lists up but as your lists get more comprehensive, full of NPD numbers past and present, it would be completely up to NPD's discretion on when they feel like shutting you down.
This is one of the problems in the videogames industry, there is no de facto source of game sales information, and what information is out there is controlled by the one group that actively tries to collect it, NPD.
This is also why the simExchange is so interesting and exciting, together we are using all our collective knowledge and insight to get to a number and closer to the truth. As more people become active and participate on SE the predictions should also become more accurate.
Here is a link to Kotaku about NPD.
http://kotaku.com/gaming/npd/npd-how-it-works-229825.php