In case you've encountered this, and you are wondering...
I didn't find anything about this online specifically for people with large networks, except general advice on the LinkedIn website, so now here it is... :-)
P.S. I still like and recommend LinkedIn - it is still very useful to jobseekers in general, and I never met an interesting piece of software that didn't have its bugs/misfeatures. Caveat emptor. YMMV. No warranties expressed or implied. :-)