至於客戶，他們不僅做了一件做了一件善事，也對現在海洋污染有一定的了解，

至於客戶，他們不僅做了一件做了一件善事，也對現在海洋污染有一定的了解，還可以與喜歡的明星/KOL一起參與活動，並且可以優惠的價格購買到產品。

結果 (英文) 1:

As for customers, they not only did something done a good deed, but also have a certain understanding of marine pollution now, you can also participate in activities with like a star / KOL, and at discounted prices to buy the product.

結果 (英文) 2:

As for customers, they not only did a good thing, but also now have a certain understanding of marine pollution, but also with the favorite star / KOL to participate in the activities, and can be purchased at a discounted price to the product.

結果 (英文) 3:

To the customers, they not only do a good job, but also have a certain understanding of the current marine pollution. They can also participate in activities with their favorite stars / KOL, and can buy products at preferential prices.