2018:
People claimed Blackpink was lacking in album sales, although they had three massive hits in the same year and also, underestimated their streaming numbers.
People claimed Gfriend was bigger than Mamamoo due to album sales. even though Gfriend wasn't having a hit since 2016
2019:
People claimed KTL was a flop, even though Fancy didn't do that much better
Although Mamamoo was having a good track of hits, people still put them behind Gfriend
Now:
Blackpink is by far the biggest kpop female act ever
Mamamoo almost catches up on Red Velvet's numbers at a certain point, something rare for a small company group