I was searching for a listing of search engines. I found that Alexa had "The top 500 sites on the web" and thought that it would be good because Alexa use to list search engines rankings before Amazon bought it. As I went through the listings on Alexa and checked each search engine, I found that at least half of the listed search engines were defunct, no longer search engines, or were companies selling products. Others were now malicious sites that have taken over many of the domain names. I had to be really careful to not infect my computer while checking the urls.The top sites are still in existence but what are their true ranks?There is no way to contact Alexa support unless you sign up for a trial membership. So, you can't even question their data. A membership starts at $149 a month. Certified Alexa Rank starts at $19.99 for 10 million pageviews per month. What are they certifying? What are people really getting for that amount? The information is old. How can site owners be given rankings if Alexa doesn't even know what it is ranking?To me, Alexa is a scam. I would advise website owners to think twice before signing up Alexa.I have images that I can't upload here. See Sitejabber.