Can you expand on what you do for adding content to linked in every day? And how does that help?
Perhaps it was coincidence, or perhaps putting the right things in your profile tends to get you noticed?
I added people that I had interacted with at my previous companies as connections, I listed any articles I've written, put up links to personal projects/sites and reduced my skills to a small list of strong skills. I also joined a few small but known groups related to my work and made a couple of posts. Nothing too special, just a few posts here and there to answer some questions. Finally, I added my Stack Overflow reputation and any "out-of-work" stuff I handle. Basically, going from 30% completeness to 100% completeness on my profile.
A few days later I checked back on my profile and found that my profile views had gone from zero to around 10-15 a day. I tend to get a lot of recruiter spam on there but have had a few EMEA recruiters from Google, Microsoft and Facebook stop by my profile. No offers, but always nice to see people interested in reading about me.
What worries me is that recruiters must think that this is a legitimate way to source talent...
this helps because people presumably (i) see your content and (ii) this helps you in search
note two years ago I found that LinkedIn group were choked off by useless spam announcements and discussions. Things are much better now in some groups.
Spam is still a problem in many LinkedIn groups, but it's the responsibility of the group administrators to keep it under control. Many groups are dead but many are worthwhile.
LinkedIn lets you join up to 50 groups and you should take advantage of this fully. Of course, you want to join the best 50 groups so look for good groups and unsubscribe from bad groups.