Just tried it, not sure if they're suppose to be working they way they're meant to.
The first 5 codes apply to Warships, which is a different tab than MS/MA. The changed values only stay the first ship you own rather than (1st) slot. Switching units into the slot doesn't have any effect. So technically it isn't working properly.
Same applies to the character (1st) codes.
Player 2 and 3 codes don't work at all.
Code:
[Max Capital]
04000000 01549158 3B9ACA00
[MS/MA 999 Upgrade points (1st)]
580F0000 01549160
780F0000 00000018
640F0000 00000000 000003E7
So far, these two are the only codes that work properly. The second code where if you put a new unit in the 1st slot, the values will apply to that unit and you can keep swapping units into the slot.