> For the complete documentation index, see [llms.txt](https://david-oh.gitbook.io/insta-land/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://david-oh.gitbook.io/insta-land/ecosystem/1.-key-currency-marble/2-payment-function.md).

# 2) Payment Function

* MARBLE serves as the primary payment method within the Insta#LAND ecosystem. Within the ecosystem, MARBLE is used for key transactions, including the purchase and trade of NFTs, payment of advertising fees, tipping, and purchasing products. MARBLE is the sole means of payment within the ecosystem for these major transactions. 
* To mine MARBLE, it is essential for ecosystem participants to purchase NFTs. While some NFTs may be obtained for free or rented, purchasing specific items is necessary for upgrading levels and enhancing functionalities. MARBLE is the sole means of payment for NFT transactions. 
* The Insta#LAND platform displays advertisements from external advertisers and distributes the revenue among participants according to their level of engagement. The distribution of advertising fees also involves paying with MARBLE. Participants who wish to advertise their travel products within the app can pay for advertising fees using MARBLE. 
* Guides can earn additional income through tips paid in tokens in addition to the product price or cash payments. This feature will function as a significant source of income for guides, and MARBLE serves as the primary payment method.
* To expand the use of MARBLE to more transaction outlets, Insta#LAND enables travelers to pay for tour courses, shopping, and other transactions using MARBLE during their trips.

In summary, MARBLE serves as the primary payment method within the Insta#LAND ecosystem for key transactions, including NFT purchases, advertising fees, tipping, and product purchases. It is the sole means of payment for NFT transactions, and guides can earn additional income through tips paid in tokens. Insta#LAND aims to expand the use of MARBLE to more transaction outlets.