Instead, they would be incentivized to kill other persons for whom players are betting they will live. On the other hand, players know that, so they will never bet against an assassination, except in the case they really do want to lose, thus transferring their loses as payment to the assassin.
Besides being absolutely nothing new; The realer versions of this have existed on the deep web for over 5 years where people could bet with BTC (assmkedzgorodn7o).
Maybe Augur could potentially be used this way. It is not currently being used this way. This article is trying very hard to rile you up about these dangerous assassination markets but is pretty dishonest about the fact that it's talking about a possibility, not a reality.
It's also not like Augur has suddenly made assassination markets possible, they already exist and the world has failed to come to an end because of it.
If anything, it is helpful for the target: they can know when to invest money to protect themselves, and collect on the failing prediction.
Oh, sorry, I forgot. Markets solve all problems, right?