"People who have you in their email contacts - and have imported them to Facebook - are probably suggested to you too."
I noticed this behavior when I signed up to test this first using an old email address. It had known friends as suggestions as well as people who had already requested to be my friend, including my actual profile. I don't explicitly remember important my email contacts but it is a possibility.
Looks like it treats both contact books the same, even if a user didn't add the individual contacts at the time of import, it keeps a record of them to potential make suggestions at some future point in time.
Comments
"People who have you in their email contacts - and have imported them to Facebook - are probably suggested to you too."
I noticed this behavior when I signed up to test this first using an old email address. It had known friends as suggestions as well as people who had already requested to be my friend, including my actual profile. I don't explicitly remember important my email contacts but it is a possibility.
Looks like it treats both contact books the same, even if a user didn't add the individual contacts at the time of import, it keeps a record of them to potential make suggestions at some future point in time.