You can buy a Mobile Game Asset from developer's Web Store just like buying a game key. Go to the developer's Web Store and search for the virtual asset or item you're interested in:
Search for Virtual Item or Virtual Currency you're interested in on the Game Developer's Web Store
Navigate to the desired product and access its Product Page:
You can choose different Variants of the Virtual Item or Currency
You can choose different Variants of the Product as long as the Developers have set them up, example:
500 Gold or 1000 Gold
500 Gems or 1000 Gems
Each Variant is unique and can be added to Cart. It's also important to give proper USER_ID or SERVER_ID if the developer has required such information:
Remember to fill in your USER_ID or SERVER_ID when it's required - this is important to properly receive the item in-game
Only correct USER_ID or other relevant data requested by the Developer will ensure you'll receive the item in-game. These are fields that must be filled.
Once you've added all desired items to the Cart, as seen in this example:
Added Virtual Assets to the Cart
Next, as you finish your payment, you'll get a confirmation that the purchase data was sent to the game's server:
After successfully finishing the transaction - your item will await you in-game!
Congratulations! Now come back to your game and you should have received that item already!