What is the secret? I do not see the mechanism described. I just see that <$300 was spent with a vendor, SkyPilot.
Perhaps there is an algorithm for choosing spot instances?
SkyPilot is actually the tool that helps you find the resources on any cloud, including AWS, GCP, Azure, IBM (comming soon) or even Lambda Clouds. It can automatically search for the spot instances across all the regions and clouds, based on the availability and prices.