How are those yields sustainable? Isn't that how these various exchanges keep collapsing?
Not all defi's are created equal and not all yields are created equal
The quick answer is the yields come from Token emission, aka they print tokens to pay you yields
Pancakeswap has a token called Cake, which are the governance tokens for the whole Pancakeswap crypto platform ecosystem. Think of them as stocks in the Traditional Finance
Pancakeswap is the most profitable crypto platform in BSC and collects millions of $ worth of fees, so in order to protect the value of the Cake tokens from getting diluted to $0, they buy back millions of $ worth of Cake tokens every week and burn them
Pancakeswap has burnt more Cake tokens than the circulating supply of Cake tokens
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Venus is a decentralized crypto bank but unlike Genesis, BlockFi, Celsius, and Voyager it did not go bankrupt. In fact, AAVE is also a decentralized bank that did not go bankrupt
When FTX and Celsius was in the process of declaring bankruptcy, they paid off their crypto loans from the DeFi crypto banks like AAVE and Compound
Why? Coz those fuckers cannot cheat defi crypto banks, they want their collateral back, they gotta pay the loans on the smart contract
Venus has a governance token XVS, same concept as Cake. Venus collects fees through interest rate differential between the depositors APY and the borrowers cost APY
Then just like Pancakeswap, Venus has a treasury that buys back XVS tokens to protect the value from being diluted
https://venus.io/
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Spookyswap has a governance token called Boo, same concept as above, but currently, Spookyswap is not making enough profits to do a buyback of the tokens
Think of a tech company that has no profits, you're hoping that it will be profitable in the future and give back value to the shareholders
So my 20% APY salary for being an automated market maker is being paid by chuck e cheese type of tokens at the moment. This is the riskiest out of all the ones I mentioned as this may be considered a ponzi, but I believe in the Fantom and Spookyswap being the biggest dex on the Fantom blockchain that I'm willing to take the risk