Not OP, but you can't set a per api key limit in OpenAI Platform, you also can't really easily see spending going on per key, and its also in a far off page separate from the keys, really not easy to see what is going on with spend in real time.
You're supposedly worth a trillion dollars, can't you know... pay for your own market research rather than forcing the public to provide it for you? Is this what they seriously teach devs there?