Uhh, some of you are trying way too hard
Her first 2 albums basically didn't contribute towards her sales. We ride didn't even chart in the US. Then we have singles with mediocre sales like Pon De Replay, SUAD, Rehab etc. And when we add the messy dual releases and Rockstar 101 of course that her average sales will be low compared to her peers who haven't so many messy releases.
On what planet Umbrella, RR, R101, MD weren't risky?