Just by saying BUD (1600 SP)

If their "new" DM+ is 2400 SP, that would be nonsense as CX uses a "200" points tier after DM. (1400 for F lounge invitation, 1600 BUD, 1800 Gold invitation).
"Blanking" 1200 to 2400 will just let people stay at 1200. (rollover does not mean a thing as 1200 is somehow easy for DMs)

The thing is BUD is hard to use as they have no "certain" rules on how to use it (faced A class was selling but did not clear my BUD).
CX seems to have a problem with "Understanding" customer needs. In their mind, customer complains about BUG/BUD so we can just "cut" it to solve it.