Yeah. They were pretty bad, even fairly recently. Questionable Data would have been a better name for the site. I'm assuming they've improved.
They were recently bought by Nielsen and are now a direct threat to NPD (NPD has direct data maybe SuperData is entering that space as well), interestingly enough, NPD is starting to give more data on the game sales from Mat Piscatella twitter. But I think thats where their improvement is coming from.