Here's what I was talking about with AAVE earlier. The dashboard makes things (slightly) less confusing.
At the moment it's not even as good as staking (18 percent) depending how you structure it.
Currently I'm borrowing MATIC with MATIC which leaves no inherent risk, because you pay back the loan in MATIC so no matter how far up or down it goes, it doesn't matter, but borrowing this MATIC costs 6.76% variable APY with a current wMATIC bonus of 15.63% APR, in addition to the 2.35% APY for holding it, with an addition bonus of 6.79% APR. You can borrow *more* MATIC with the MATIC you borrow.
You get fed back wMATIC every 10 seconds (you can see in this screenshot I have 6.34 banked.)
Now, the goofy thing is, you have to reshuffle this all the time because the APY for borrowing will sometimes jump up to like 20 percent and the bonus will go stay the same or down 1 or 2, which will put you at parity with the 2.35 + 6.79 percent bonus on the other side. No bueno there.
What *really* nets money is borrowing a stablecoin with MATIC, waiting for MATIC to go up, then repaying the loan with a higher value MATIC, which nets you more MATIC overall. You just have to borrow way less to be safe (health factor over 2.5 or so) to avoid any catastrophic drops. I'm very conservative so I wouldn't do less than 3 probably.
If there's any legit DEX that comes out I'll consider putting it in a farm, i.e. Pancakeswap, but for Polygon. There are already some in existence on Polygon but they're way dubious. AAVE is legit and backed by Polygon.
Probably still a bit confusing but once you get into it it's pretty simplistic.