First just a fact: Chordie is a search engine. No songs are posted here.
What songs that are included is my responsibility. But there are more than 1 million songs indexed from around 100 different sites, and I do not look at them all.
I do remove sites when the quality is too low, and I generally add more fan-sites than large archives since the quality of the fan-sites seems to be higher.
To make Chordie better, it is something you can do(!!!):
* Always rate songs. Songs with low rating will disappear in a few weeks if there are better alternatives available. Sometimes I discover patterns in the ratings, and this might lead to entire sites being removed, or artists from one site being preferred.
* If there are small errors: Add comments to the songs.
One advise to the raters: If you find different versions of the same song with varying quality, exaggerate the rating. Ie: Give the worst song a very bad rating visa versa. This will give my algorithms a very strong hint about removing the worst song, and Chordie will be a lot better.