Facebook share count – rate limit?

CONTEXT

I’ve added a share count call on a WordPress site using this code:

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  foreach($url_list as $url){
    //Facebook call, returns json of shares of this url
     $json = json_decode(file_get_contents("http://graph.facebook.com/".$url),true);
     $count_recipe = $count_recipe + ($json['shares']);
  }

I’m using it to get the share count for 10 different URL’s, add them up and then display the sum to the user. I’ve read that the rate-limit for Graph API is 200 calls per user per hour (link).

PROBLEM

Since I’m not actually let people post to their own FB, I’m not sure if my calls will be treated as coming from different users (in which case I won’t pass the rate limit), or from a single user (in which case, I will surely pass the rate limit). If the latter is the case, is there a way around it?

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