as Luna approaches 0 in value, the amount of Luna you get from burning a UST approaches infinity.
"There is an automatic contract that gives you $1 worth of LUNA for every UST you spend. It is effectively trying to print more and more of the worthless LUNA token to restore the dollar peg of the UST token. Nobody is buying enough LUNA for this to work, so both of them will go to zero. LUNA is already below 1 cent and UST is below 20 cents."
"There is an automatic contract that gives you $1 worth of LUNA for every UST you spend. It is effectively trying to print more and more of the worthless LUNA token to restore the dollar peg of the UST token. Nobody is buying enough LUNA for this to work, so both of them will go to zero. LUNA is already below 1 cent and UST is below 20 cents."