What is fcoin 'Trans-fee mining'?

Could you elaborate on the concept of 'Trans-fee mining' in the context of FCoin? Specifically, how does it work and what sets it apart from traditional cryptocurrency mining? I'm curious to understand how this model incentivizes users to participate in transactions and whether it has any potential implications for the overall market dynamics of the cryptocurrency ecosystem. Additionally, I'm interested in knowing whether this approach has been widely adopted by other exchanges and what the general consensus is regarding its effectiveness.