function arrayUnique(arr) {
  const playlistid = []
  return Object.values(arr).reduce((acc, i) => {
    if (!playlistid.includes(i.playlistid)) {
      acc.push(i);
      playlistid.push(i.playlistid)
    }
    return acc
  }, []);
}

<button class="btn btn-info btn-acc" onclick="window.open('https://multihack.qq/reviews.php?seller_id=693331&product_id=2464802')">Отзывы</button>

function arrayUnique(arr) {
  const playlistid = []
  return Object.values(arr).reduce((acc, i) => {
    if (!playlistid.includes(i.playlistid)) {
      acc.push(i);
      playlistid.push(i.playlistid)
    }
    return acc
  }, []);
}