I don't think Lisabar will have enough for 300k copies, for The Album they had 9M yuan (130k) but had more time to save money. People shouldn't expect +800k sales.
Actually their c bars contribute more with their solo stuffs than with the group. Just look at Rosé, her c bar contributed more for her solo than for BP full album.
They are literally solo fans who "respect" and support the group, but will always put the solo gigs in first.