I don't want to start a debate with someone who possibly (and probably) knows better than me but my thoughts are:
No the purpose is to PUT the weight on the wheels to allow best brake performance. He or she did not say increase weight full stop, he or she said 'to allow more weight on the gear'.
Yes the spoilers do increase aerodynamic drag and 'dump' the lift but their purpose on the ground is to put the weight on the wheels. In the air they represent poor planning! If they don't deploy on the ground, braking can and will take alot longer as seen with the American Airlines MD80 crash in Texas.
They certainly do not increase lift coefficient so it's a or b - they increase parasitic drag. Would you mind explaining why it is chordwise and not spanwise please? I can see it being Spanwise and chordwise! Induced drag comes in the form of vortices off the wing tips (amongst other places) from a spanwise flow. If you reduce lift surely you affect spanwise flow and thus 'control' it?
Apologies for the range of colours, it went funny when I tried to quote the previous post!