Taxpayers spent $0. They gave up the potential to make $600 million. And that was only if Orion created the full 4,000 jobs. So they potentially only forwent ~$135 million based on the actual amount of people hired.
But it's ridiculous to frame it this way. If a store gave you a coupon for $20 off your order, no one in their right mind would say the store "spent $20 on a subsidy". Especially if I never even cashed the coupon!
If you don't think corporations should get tax breaks that's totally fine. But framing it as an outlay is misleading.