title: Is there a quota / limit of 1500 for google contacts api sync?
body: <p>I am using a Thunderbird mail plugin "gContactSync"
  This week myself &amp; 10+ other users found the plugin can only sync 1500 contacts.
  Nothing has changed in the plugin or thunderbird.</p>
  
  <p>We believe Google API contacts has changed.
  Can anyone please advise what the 1500 limit / quota for syncing contacts is?
  How do we resolve?</p>