One basically puts public domain information online in searchable form and gets massive traffic + ad revenue. Took a while to set up, very boring, but very easy

One basically puts public domain information online in searchable form and gets massive traffic + ad revenue. Took a while to set up, very boring, but very easy to maintain. Note that being the first mover was very important, the #2 competitor for these niches gets about 20% of the traffic of the winner (and I assume 20% of the revenue). Another one literally finds links for a particular political topic and sells the combination of links at something like $1000/month. I have no idea why they're so successful-their process consists of Googling said topic for a few hours a week and posting the links on their website-but somehow it works. Like ThomasLangston mentioned, unsexy markets really work, because you're not competing with the best and the brightest...in fact, you're often not competing with anybody.