Welcome to WebmasterWorld Guest from 22.214.171.124
Forum Moderators: open
a few reasons have been mentioned before, and I have my own ideas which unfortunately I am NOT too keen to share.
Rest assured its NOTHING to worry about.
(you do NOT think, they give all that Free traffic without doing some research, do you?)
Here's an example of when they had it switched on for "hotel". They track certain keywords sometimes, the reasons aren't clear.