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Decentralized Finance (DeFi) services are moving traditional financialoperations to the Internet of Value (IOV) by exploiting smart contracts,distributed ledgers, and clever heterogeneous transactions among differentprotocols. The exponential increase of the Total Value Locked (TVL) in DeFiforeshadows a bright future for automated money transfers in a plethora ofservices. In this short survey paper, we describe the business model fordifferent DeFi domains - namely, Protocols for Loanable Funds (PLFs),Decentralized Exchanges (DEXs), and Yield Aggregators. We claim that thecurrent state of the literature is still unclear how to value thousands ofdifferent competitors (tokens) in DeFi. With this work, we abstract the generalbusiness model for different DeFi domains and compare them. Finally, we provideopen research challenges that will involve heterogeneous domains such aseconomics, finance, and computer science.

A Short Survey on Business Models of Decentralized Finance (DeFi) Protocols