"It's about choice."
Ouya has been changing quite significantly over the past few months, going so far as to become an ecosystem for Android--not just a hardware platform. Another key change coming to Ouya: the abandonment of the free-to-try model originally required for all Ouya games.
"In the coming weeks, we're going to let devs choose if they want to charge up front for their games. Now they'll be able to choose between a free-to-try or paid model," Ouya's Bob Mills explained on their official website. Admitting that the platform was originally against this, Mills says that "many devs had trouble meeting the requirement."
Some of the complaints included certain devs not having the budget to make a separate demo for their game. Others didn't believe it made sense creatively to make a demo. Ultimately, Mills says that the decision to move to a for-pay model enables choice. "Give devs the freedom to choose. That's openness," he concluded.