Because this is one of the very few websites you can actually write/comment without being a member and give some information about yourself. I personally write here pretty often but never wanted to become a member because the only difference is that you get points, you can send PMs to other members, no visual verification, you can vote etc. and i am not interested in any of those. For me, my privacy is more important. Plus anybody (a Christian, a Jew, an Atheist etc.) can write about Islam here. This website is not strictly for Muslims only. Its not written by some Seihk or Hodja. You get opinions about Islam and Muslims from every different points of view. Freedom of speech :) This makes is unique here. The only downside of this website is that i dont like the theme, the coloring, the look. It should be lot more professional looking .