And it would be hilarious if this ends up giving us video game enemies that don't suck. (Until, of course, someone accidentally creates an RTS AI that manages to 'break out' and conquer the world or something)
to (accidentally) change their fitness function to change it to "conquer the world" they'd need to modify a lot of different processes at once.
IMO the chance is negligible for now.
In niches where business decisions are data driven, connecting a supply in some market to a demand in another, the choice of what to buy and sell could conceivably be automated.
Like gauging demand for mug/thermos/branded item du jour on amazon, checking whether similar items exist on alibaba and then setting up an amazon market place that resells your slightly rebranded but identical item from alibaba. Of course this all hinges on the data - an algorithm is prone to fall into traps that some humans fall into (i.e. the company you buy from only sells the box and not the product).