This little detail is what's stopping me from investing in this project (via upgrade to Level 3).

Hi sanbel,

I sent you a PM, I look forward to corresponding with you. I am also running a Blockchain Mastery course.
My company will be selling pre-configured USB wallets in addition to the above course.

It will cover basic (To us, at least), security protocols, anonymity and transacting with blockchain assets on exchanges. Stuff we take for granted.

https://www.iras.gov.sg/irashome/GST/GST-registered-businesses/Specific-business-sectors/e-Commerce/

Buying Goods or Services Using Virtual Currencies
When you use virtual currencies to pay for goods or services, the transaction will be considered as a barter trade.

There are two supplies made - one by the supplier who supplies the goods and services, and another by you who use virtual currencies to pay the supplier.

GST will need to be charged on each supply if the respective supplier is GST-registered.

However, if you use virtual currencies to pay a supplier belonging outside Singapore, you need not charge GST as the supply will be zero-rated.

As a concession, if you use virtual currencies to buy virtual goods or services within the gaming world, you need not charge GST until they are exchanged for real monies, goods or services.

Edit: Another URL: http://www.moneysense.gov.sg/Understanding-Financial-Products/Investments/Consumer-Alerts/Virtual-Currencies.aspx

TL;DR
Tax treatment for GST registered Exchanges (>1m revenue) is if a Buyer is registered in Singapore, VAT/GST is applicable.

I'm interested.

We're based in Singapore and registered as a trading company. Singapore currently considers blockchain assets as a tax exempt asset similar to precious metals.