By this reasoning, shouldn't a life insurance company be willing to sell you life insurance and defer the premium paid until you die?
Yes, an insurance company should be allowed to take, as payment, a portion of your estate when you die. One instance of this is known as a "reverse mortgage".
But there's not much point to buying insurance if they payout comes from your own assets.
http://eternal-earthbound-pets.com/Home_Page.html
Providing assurance that pets will be provided for in the event of Rapture.
Having thought it over, I'm OK with the ethics of this service.