Worthwhile in the sense that there is an incredibly large readership that will eventually see and post just about everything. I've had my preferences set to only view posts at +5 for a while. That used to give me about four or five posts on each front-page article. A couple of months ago they apparently started giving out about 10 times the mod points, as just about every article now has over 20 +5 posts. On front-page articles 40 or more at +5 is now common.
IOW there's just too much noise now. But it is still a good place to post press notices of something you want to get a lot of traffic.