I cannot say anything for sure but, purely speculating, it could...

I cannot say anything for sure but, purely speculating, it could go like this:

We launch the mobile app.

Subscription:
Singtel pushes the subscription.
ESH get's a cut of the subscription amount.

In app purchases:
Skins, cosmetics and other things are purchasable with in-app currency.
Currency can be purchased with real-world money.
System integrates with zSilver and allows you to earn and buy Razer gear.

I could go on. You can look at Heroes of the Storm, League of Legends, and so on for examples of platforms where you earn and/or purchase currency in game. That sort of model with cross-game support makes a fair bit of sense to me.

Buying into tournaments for real-life currency comes scarily close to what some countries like Singapore and Australia could easily consider as online gambling.

Once again, this is purely speculation. I have no knowledge of the commercials involved.