<p>I think what I’m talking about is this, called “Unlimited Operations Attacks”. [url=<a href=“http://www.latimes.com/business/la-fi-atm-hacking-20140403,0,4473571.story]Here[/url”>Banks are warned about ATM hacks]Here[/url</a>]. I just thought it was an interesting method. </p>
<p>But the general points are: don’t trust any exchange method as being secure and the last thing to worry about is whether your posts, emails, etc. are being scanned and tracked for connections, ad sales, etc. </p>
<p>I use LinkedIn for professional contacts. It is a great way to keep up with people I have worked with through the years, much like I keep track of nieces, nephews, cousins, babies, their grandbabies,etc with FaceBook. In neither case do I give the site access to my contacts, but both suggest links or friends based on the connections I already have. In your case it is as Calmom says, someone had you in their contact list based on an old email because email systems keep those unless you clean them out. They allowed access to their contact list and the connection suggestions are based on their connections. IF you create an account it will begin to suggest ones that are closer to you. This is not the same as the cookies advertisers use. </p>
<p>The ad tracking is called re-targeting and there’s plenty of info if you google to help you understand how it works.</p>