What niches have high and cheap traffic ( no more than 0.1 per click on top3 ) ? Except Adult. P.S. Not planning to arbitrage
I think medicine is one of them. If you have a site based on medicine you get high traffic and money.
free image hosting and freefile sharing also comes under the list i have seen huge traffic with proxy websites.
Maybe I haven't clearly explained - under high traffic I mean high search volume on search engines. Of course if you have good website you can get decent ammount of traffic at any niche. But I don't think there is huge ammount of people who is searching terms like "proxy website" or "free image hostings"
Follow google trends, this will allows you to see the most searched keywords on daily, weekly and monthly basis. Identify most used keywords and do some research to get the search volume for that keywords.. Cheers, Kranthi.