To upgrade membership, you need to buy the corresponding number of activation codes at one time. At the same time, different levels of members enjoy different activation codes discount.
You could view the details on the Membership Level Diagram like membership level division, the number of activation codes required to upgrade and the price of activation code for different membership levels.
Membership Levels Division
The Number Of Activation Codes Required To Upgrade
Price Of Activation Code For Different Membership Levels
For example, if you're a new member who just signed up that means you're VIP0. You need to buy 3 activation codes at a one-time price of 150USDT to upgrade to VIP1 if you want. But after you upgrade to VIP1, if you want to upgrade to VIP2, you just need to pay 120USDT for each activation code.