I can assure you that no internet company is going to give your personal infomration out to any advertiser who happens to have been visited by your IP address unless something criminal has occurred and a warrent has been issued. Your IP address, for most people, is randomly assigned at login. The only way to get your personal information from that IP is to request that information from your ISP and as a former ISP employee I can assure you that they do NOT give that information out freely without very strident legal reasons.

It is a miracle that curiosity survives formal education. - Albert Einstein