My personal belief is that the intent is all of the following:
1) metatypes get their racial qualities for no karma
2) these racial qualities do not count against the limit of 6 qualities total
3) since they have a karma cost, anyone who doesn't get them for free may purchase them. Yep, you can have elves with armored troll skin, humans with thermographic vision, and etc. I blame SURGE.
Messing around with these assumptions would of course dis-incentivize metatypes compared to humans. If that's your roll, then have at it!
