Yeah -- you're all voicing opinions, none of you are really backing it up with anything.
Also, I have no idea why power-points going up with magic for MAs keeps on coming up -- that's clearly banned by the rules, make another thread if you want to talk about houserules.
There's two relevant sections:
Pg. 326
Power Point (Adepts Only): If you’re an adept, you
gain a Power Point instead of a metamagic. You can take
this as many times as you like.
This says
adepts only. Does that include Mystic Adepts? Maybe, but they make a big deal about separating Mystic Adepts and Adepts in other sections. So, I'm not really sure that MAs can even take the metamagic. Maybe they can, I'm just saying from the words on the paper, it's not clear. If someone has a developer quote from somewhere, that's great, please let me know.
Mostly pg. 71
adepts must purchase Power Points using Karma at the
cost [5] Karma per full Power Point. The maximum number
of Power Points Mystic Adepts may have is equal to their
Magic rating. These points would be purchased during
Step Seven: Spending Your Left Over Karma (p. 98).
Now, this is during the chargen stage, but it should be noted the karma is spend at the last stage, which is otherwise the same as spending karma in-game. SO WHY does everyone assume you can't buy power points (up to your magic) in-game, either?
Also, if you can't, if you can only get new power points via the metamagic -- which again, everyone assumes but I don't see good evidence for-- then it leads to this sorta weird situation where a Mystic Adept is never going to get any metamagics, the power point is always going to be more useful.