> For the complete documentation index, see [llms.txt](https://bbc.gitbook.io/bbc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bbc.gitbook.io/bbc/3.0-economic-models/3.3-bbc-mechanism.md).
# 3.3 BBC mechanism
A) Transaction Handling Fee Destruction
A portion of BBC from the 5% handling fee collected by the platform from various transactions will be permanently destroyed on a regular basis. The specific destruction ratio will be voted by the community to ensure the transparency of the mechanism and the consensus of the participants. This process is automatically executed through smart contracts to ensure the irreversibility and openness and transparency of the operation.
B) Activities and incentives for destruction
The platform will organize various activities from time to time, such as game competitions, community contribution rewards, etc. Some of the rewards will be destroyed after being issued in the form of BBC. Comprehensively enhance the attractiveness of activities and effectively reduce the circulation of BBC in the market.
C) Public Welfare Donation Destruction
In support of public welfare projects, the platform plans to use part of the BBC to donate, and accordingly destroy these BBC, which will increase the scarcity of BBC in the market by destroying it at the same time of supporting charitable causes.
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