If we're not doing a full run, limit to media uploaded to wordpress 'recently'.
        'Recently' in this case means 90 days before the date we're processing content from.
        The wp.com REST API doesn't have a way to limit based on media modification date,
          but this should be relatively close.

        :param params: the GET params dict, which may be updated to include the "after" key
        :return: None (side effect: possibly modified params dict)

def set_media_params_after(self, params):
        """
        If we're not doing a full run, limit to media uploaded to wordpress 'recently'.
        'Recently' in this case means 90 days before the date we're processing content from.
        The wp.com REST API doesn't have a way to limit based on media modification date,
          but this should be relatively close.

        :param params: the GET params dict, which may be updated to include the "after" key
        :return: None (side effect: possibly modified params dict)
        """
        if not self.full:
            if self.modified_after:
                ninety_days_ago = self.modified_after - timedelta(days=90)
            else:
                ninety_days_ago = datetime.utcnow() - timedelta(days=90)
            params["after"] = ninety_days_ago.isoformat()