You could get the Star Member Badge by purchasing the second tier gold package. Currently you can't get it because its equal gold package was removed.
Current version of this badge is Vault Of Gold.

The design of Star Member, 2016 - 2020
Trivia[]
- Previously, after you have purchased, you will receive 2 000 Gold.
- The new name of star member was Vault Of Gold.
- A few years ago this tag was expired but returned to act again later.
- Its was costs $19.90 USD.
- Formerly, a Star Member gave you 6 000 gold and 120 000 XP.
Availability[]
This badge was available on Live and Brazil servers.