In my experience, Cracked Blue Eye Orbs also place preference on whatever location you're in.
They do, but the effect feels less significant than on the other methods.
When I first started to spam CBEOs in Iron Keep, I had about 30 of them. Around half (or less, it's been a while) resulted in an invasion in Iron Keep, while the others were all over the place. With about the same amount of CREOs spammed in Hunter's Copse, I only had one to three invasions outside of that area. YMMV, but I'd really love to know the mechanics behind that stuff.