Is anyone using/had experience with Sovryn Zero?

I've used platforms like BlockFi, Ledn & Nexo in the past but dont want to touch Cefi for obvious reasons. Been looking into Sovryn but its alot more technical so trying to better gauge the risk trade-offs.

My understand is that I don't have to handover custody but the tradeoff here is that I would be using a smart contract, which would be susceptible to bugs. The other way to lose bitcoin, as with all lending is being margin called. I note they offer over 90% LTV but recommend 67%. Not sure why the recommendation is so specific.

Minimum loan appears to be $10k, so have to put in a substantial amount to the smart contract and take a hit on origination fee between 0.5%+.

Given that I keep custody of the coins, how can 'lending' them out in this way possibly benefit any borrower?