With Apple Vision Pro, I need to subscribe to Unity Pro

Today, Friday, June 14, 2024, was the day preorders for Apple Vision Pro in Japan started at 10:00. So I waited from the morning for 10:00 and placed my order as soon as I could.
I chose the 512GB model. I was unsure whether to go with 256GB, but I have a personal superstition that when I am unsure, I do not buy the lowest model.
Because I bought something quite expensive in one lump payment, I felt a little tired. Then, while working through the day, probably because Vision Pro was such an expensive purchase, my credit card company contacted me for confirmation, and the payment had not completed.
When I contacted Apple, they said the status would update after several checks. Still, Apple's phone support is impressive. From the call, they knew I had bought Vision Pro that day, and they connected the conversation to delivery dates and order status.
So I am still in a slightly unstable state where the payment has not fully completed, but it will probably be fine. Once I calmed down, the next thing came to mind.
Come to think of it, without Unity Pro, I cannot export for VisionOS. Unity Pro also has a trial period, but I used up the initial free period during the hackathon. So what now?
Well, there is no real choice. If I also buy Unity Pro, the total enters the one-million-yen range.
The correct answer is: "Buy it, then earn." I think that is it.