If you can't pay via alipay or wechat, I don't think you will be able to play any special characters in this game.

But hey, It's their income. why don't they like money ? I have 3 reasons for you

1. "PayPal is restricted in China" They only sell them via alipay and wechat because alipay is very popuplar payment method in China. they only need QR code and smart phone to purchase anything.
   
2. They want to take their profit without sharing. From Valve's policy that Valve gives 50%(i guess) to creator. Avalon have sold their RoC1 pass in steam store for 1$ but don't give you any SP chars just soul,exp and merit bonus. if you want to play SP chars you must pay via alipay or wechat from this link http://avalondota2.com/store you will see the price for any chars about 5-6$. but if they could sell through steam store and remain their profits they need to raise prices to 10-12$ may be it's too high and they think no one wanna pay for this.
   
3. Only chinese market is enough no need to make more messy

From these reason, If they want your money so bad but they can't. So, they decide to do nothing with your questions about VIP because if they tell you they can't sell then what's next ?
Nothing changes. They still can't do anything but make more players quit. Just let you hope that one day will be VIP available in store is better.

This article is not official. It's just my opinions. We're still waiting for non-chinese store hopelessly.