I'm a member of GC and think it's worthwhile. When you join, review all the posts of the month, going back quite a few years. There are a lot of gems in there. When you think about how much money you're risking playing BJ, it's a small price to pay.
Day to day, there's some good stuff, and some garbage, too. My biggest complaint about that forum is the antiquated software they use. Search is not easy and finding new postings is cumbersome. There was a plan to convert to vBulletin not long ago, but many members objected. One thing they're afraid of with vBulletin is introducing smilies and other silly graphics. Also, their IT guy was unable find a working conversion program to prevent loss of existing posts.