Good for them, even if CL was pretty bad in my opinion. I wonder if this is mostly the dedicated fanbase picking up the album, or new listeners who are attracted to their now-super-radio-friendly sound.
Mmhmm sold 51,000 copies week 1, which was #15. (according to their itunes bio)
Five Score sold 64,000 in its first week. which was #6. (wikipedia)
that's the only recent release I could find sales numbers for. I found chart positions for pretty much all of them, but that doesn't mean much out of context. even what I found is not enough to really track their sales at all. wish I could find FANSD numbers.