Sign up for a Rakuten shopping account and get US$40 cashback when you spend at least US$40 at any of their merchants.
By shopping at Iherbs with a spending of US$40, you will be entitled to free shipping to Singapore. On top of that, you will receive your US$40 from Rakuten and an additional 2% from using the platform.
US$40 bonus with US$40 spending is by far the highest bonus I have seen compared to other rebate platforms. I will definitely use this platform to purchase my supplement from Iherb.
If you are planning to purchase supplements or books, please do consider signing up with my referral for a bonus of US$40.