there is a bit of misdirection and deception in the article;

the dai value is pegged to the eth-usd ticker price; the user pays in ETH to get DAI.

everything is going to be fine and rosy when eth-usd pricing is going up; however dai is going to be in trouble when the eth-usd ticker price goes down and users want to sell DAI get ETH back;

since the DAI minters can not produce ETH they will have to remove the $1 peg and lower the DAI coin value.

In addition, the question for all ‘stable’ coins is how is the fiat received (or ETH in case of DAI) is treated by the minters of ‘stable’ coins. Is it treated as profit to be spent by the ‘stable’ coin minters, or as a savings deposit to be returned when demanded?!