I would guess hiding Burst mining is much easier than CPU or GPU mining.
You only notice that you don't have much free space (depending on how much space is being used, likely not all of them) while CPU/GPU mining causes lags and fan noise due to heat so it's easier to notice.
You only notice that you don't have much free space (depending on how much space is being used, likely not all of them) while CPU/GPU mining causes lags and fan noise due to heat so it's easier to notice.
Technically you wouldn't even have to notice the lack of free space as with enough of a security breach you could mine from free space only.