A month or so ago I was messing around on micro niche finder and found 6 decent keywords that I though had low competition and good search volume. They would all be product review sites with amazon aff links to monetize, I bought 6 different domains. Anyways I used micro niche finder and google keyword tool to find all 6 keywords fell into the 8-12,000 local searches month. Now today I was searching them a bit more and see google changed up there whole keyword tool and now all 6 of my keywords are under 1,000 seaches a month, one even says its 180/month. Whats going on here, which "tool" should I believe and would you put the time into ranking for these keywords. Competition is fairly easy, but it would still take time/money to get to number #1. Thoughts?