I hit a request limit I didn't think existed

I was trying to point out that the documentation should be amended:

  1. Where you talk about there being no limits, say that's as long as you're using the CDN endpoint.
  2. Where you tell us which endpoint to use for GraphQL, mention the CDN one too.

Yes, the other endpoint was working for me, but I still managed to hit a limit. I'm currently getting a code 413 with this body:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<TITLE>ERROR: The request could not be satisfied</TITLE>
</HEAD><BODY>
<H1>413 ERROR</H1>
<H2>The request could not be satisfied.</H2>
<HR noshade size="1px">
Bad request.
We can't connect to the server for this app or website at this time. There might be too much traffic or a configuration error. Try again later, or contact the app or website owner.
<BR clear="all">
If you provide content to customers through CloudFront, you can find steps to troubleshoot and help prevent this error by reviewing the CloudFront documentation.
<BR clear="all">
<HR noshade size="1px">
<PRE>
Generated by cloudfront (CloudFront)
Request ID: oT8fSDsP9jnZWmUIPfiKw8ICsgEQirw2XMwaLQQdfHX4J5RV_6JWiA==
</PRE>
<ADDRESS>
</ADDRESS>
</BODY></HTML>