I used to use CardScan AtYourServce (once called AccuCard) for updates, but I had deleted my card file. I currently use Plaxo to synchronize Outlook, GMail, LinkedIn, etc. I was deleting duplicates, and the Plaxo de-duper wasn't catching them all, so I decided to augment it with the CardScan client's de-duper to try to catch more.
When I closed CardScan, it prompted me to back up my file. Unfortunately, my previous preference for automatic update requests was still present on their web-site. When the back-up was loaded, CardScan went wild with the new data, sending out update requests to nearly everyone I've ever e-mailed, including their text-pager and SMS e-mail addresses, mailing lists, etc. For what it's worth, the only thing I thought I was doing based on the dialogs presented was backing up my records. Needless to say, I have since found and turned off the "auto-update request" option. If I can, I'm not only deleting my data, but also my "AtYourService" account. Needless to say, I don't feel like they are "at my service," or yours.