Users need to monitor their open CDPs and add collateral if they are at risk. This has been done to protect users from paying the liquidation penalty fee, which is ~ 13%.
Also, do you really need leverage if your ETH's cost basis is 0 to 30c at the time when market price was in the range of $141 to $816 range?
It's all rounding error to you, you can basically print DAI out of thin air.