Space, The Final Frontier...In Life AND Death.

As I recall, the $12,500 is only for a small vial of the remains. You still have to figure out what to do with the rest of Uncle Louie.

Lets compare that to the cost of a standard funeral.

FromFuneralplan.com:
Individual burial space tends to start around $400-$500 per space. Add to that an opening charge of around $400-$600 per space plus a vault around $1,000. So far, around $2,000.
Those costs are eliminated if cremation takes place after the services, average $3000 plus casket, average. $2000.
An immediate cremation (without visitation) is the least costly way to go, around $1,000.
So, the typical funeral with burial is about $7,000. A typical funeral with cremation, about$5,000. Immediate cremation, $1,000.

So if they pay for the cremation that means your spending @$5K more for the space burial. Either way I'm not to sure I'd want my remains jettisoned into space like so much trash. I admit it sounds cool, but I'm more of an earthbound boy.

I wonder what ashes become as they re-enter the atmosphere?

Smaller pieces of ash???
Actually if they removed all the carbon it would probably be atomized into molecular vapor.