Never tried it but assuming you put 200usd, it will try to balance the value. say if xrp-bnb,
If bnb increase, xrp decrease/no change – sell bnb buy xrp to equalize the value on both coins and vice versa.
If both increased at the same time, then your overall profit also increase, also if vice versa.
To me its like liquid provider where both will balance each other except not doing liquidity.
If pionex offer defi staking and lp it could be nice. adding another method of earning profits.