When Ainsworth received that notification and recycle option from the Voice of The World, he didn't immediately press the [Yes] button.
Instead, he commanded his High Priest to petrify Fire Knight. After Fire Knight was petrified, Ainsworth now had time to test the props out.
The Voice of The World wasn't lying when it mentioned that Awakeners couldn't use most props and only challengers from the Main God Space could use them.
However, Ainsworth wasn't the average awakener. He remembered that his SSS-rank Freedom Freelancer's class traits had the ability to use items and equipment regardless of restrictions as long as the restrictions didn't exceed his limits by a huge gap.
'Most of the one-time use props had already been used by Fire Knight and his challenger team. After all, their life was literally in grave danger when they were fighting against the High Priests so they used all the trump cards they had without minding the cost.'