Instacard have released a public dataset[1] on their orders, so it should be even easier to verify this claim. From what I could find in some analysis[2] of this dataset around 100k orders per day and not per minute seems accurate.
I assume they are referring to how many database requests they have due to customers orders or a similar metric and just worded it poorly.
I worked at a company that had billions of views per year on a single big Postgres instance. Extremely read heavy with many queries needed for a page load. You can cache a lot of things.
That doesn't necessarily mean _new_ orders per minute. Their app or website could poll for updates every 15 seconds
Could just be looking at the "orders" endpoint in their app which might also include incremental updates as shoppers get items from the store. It's a fairly ambiguous statement
