Just for efficiency is it possible to use $org_id in both ?'s without specifying it 2 times in the $paramValue array ?
$org_id = "111"
$query = 'UPDATE tbl_member_settings SET eto = (SELECT submit_email FROM tbl_org_subscriptions WHERE org_id = ?) WHERE member_id IN (SELECT id FROM tbl_member WHERE org_id = ?)';
$paramType = 'ss';
$paramValue = array(
$org_id,
$org_id
);