Sorry, missed your question. I mean that it lets the wheels follow imperfect road surfaces better with the tension of the swaybar holding it up... generally this means more droop travel (wheels drop easier and faster)

I've never seen them with grease fittings! Cool. As you probably know... don't overpack them, just a small amount of grease, and if you feel resistance stop. Watch the boot to make sure it's not expanding.

Hopefully they look just like your old links, just with nipples.