My personal take on the matter is that there should just be an adept only meta-magic called "Gain a power point", which is effectively identical to the optional rule. I like it this way, but I can totally see why some people wouldn't want that, as it tends to give adepts a pretty quick "return on investment" from karma early in the characters lifespan.
If, however, you are in the "don't like that optional rule" camp, then you could just charge a little extra for it... something like: "Current Initiate grade x 3" karma (in addition to the cost of gaining that rank of initiation).
So, 1st IG: 13k choose "Gain a power point" metamagic = 3k, total cost = 16k
2nd IG: 16k + 6k for the PP, total = 22k
3rd IG: 19k + 9k for the PP, total = 28k
4th IG: 22k + 12k for the PP, total = 34k
5th = 40, 6th = 46, 52, 58, etc. etc.
I suppose the other option is to make an adept only meta-magic called "Gain a power point"
and allow this optional rule as well:
Optional Rule : Learning Meta Magic
If the gamemaster approves, Awakened characters can
learn metamagic techniques through other methods, in addition
to the one they acquire at each grade of initiation. It costs
15 Karma to learn a metamagic technique outside of initiation.
The maximum number of metamagic techniques that may be
learned is equal to the character’s Magic + initiation grade.
I suppose one final option might be to give adepts 1/2 (.5) of a power point when they initiate...
Anyone else use a house rule that is somewhere in between the RAW and the optional rule?