Originally Posted by gergo

When I check the open trackers topics, I always just see some poor ones, which is pretty bad. Do you have any idea about why doesn't the high quality ones opens sometime?

This is not always true as some good trackers open for sign up sometimes, but it is not good thing for high quality trackers to open free sign up as to ensure high quality members.
Some trackers forced to shut down after they enable free sign up and this happened last year with TorrentShack before they could recover.