Proven facts of cs.conference-ranking.net1.conference-ranking.net and conference-ranking.com, etc. (they are the same) have no information about who creates the ranking (at least I cannot find it) except providing an email from aol.com. I have sent them one email but never got reply.
2. It has no data and no explanation about how they ranked the conferences. My own opinion is: it inserted some conferences among other well known conferences (ICCV, CVPR, AAAI, etc). Why do they do this? You guess.
3. My archive data show that it ranked a conference (name omitted) to be top tier in Feb 2007. Well, this conference was first in March 2007. How a conference became top tier before its conference date is for your imagination.
4. I did see conference-ranking.net paid google to be put in the first page when people search for ranking. We can always guess why a ranking site wants to promote itself even by paying money. This site is playing catch-up in the ranking competition hard and when you google "email@example.com" (with the quote) you will see how many threads they posted on various forums.
5. conference-ranking.net acknowledges conference-ranking.org, which in turn acknowledges conference-ranking.com, which in turn acknowledges conference-ranking.net (a nice ring).
The quality of its ranking is up for your own judgment and I do not have any interest to continue my investigation of who is behind it.