it's all a money making scam as far as i can tell... lif you get a high score you are "allowed" or "invited" to subscribe for some magazine or membership things.. like mensa or international high iq society... although they do seem legit because typing in 'a' or 'b' for every single answer on such tests does give a really low score...
try highiqsociety.com or something, i think if you type in international high iq society on google you will find the link easily.
the tickle emode iq tests give higher scores usually than the others..
yeah im dork for taking these, but iq tests are actually kinda fun to take