Just found this board. See a few recognized names here. I like the RB research tools, i.e. quick clicks to SEC, charts, etc. RB gets a lot of less-than-serious posts, but it's easy enough to click through them. I believe that RB also has posters who are tipped by GMGC; for example you can count on PRs being up within a few minutes and sometimes substantive things appear with IMO GMGC voice-prints.
As for my lifetime membership in SI purchased back in 1999 for real cash, SI is still there and was always quite a serious place but pretty much empty now.