Our hubs get graded by people (not just once but lots of times) based on grammar, style, organization, voice, overall quality, etc. I've looked over your "Goodbye Facebook" hub and see that you're using some unattributed photos, low-quality photos, your title is unclear (maybe something interesting and magnetic like "Good-bye, Facebook! How I Got My Life Back" or something...you could probably think of something far better than I did...), your subheadings are unclear and your grammar was probably graded low because of many deviations. I'm not trying to be a jerk (lol) but the grading is pretty harsh here.
I think if you went back and fixed all that you should have no problem. :)