This is slick! I could see using this for one of my own projects. How do you get the data? Are you using the official apis or are you 'scraping'?
Everything else scales along with the cost of outsourcing that risk to services located outside of the US (like serpapi.com) who implement lots of proxies and workarounds
I'm not sure if there will be margins, so if it scales, it'll have to be very cost-consciously