It looks like Cloudflare anti-DDOS was causing the issue for us.
Here’s the exact message that appeared:
Checking your browser before accessing patreon.com.
This process is automatic. Your browser will redirect to your requested content shortly.
Please allow up to 5 seconds.
So our script was fetching the Cloudflare page, instead of the actual JSON data. I believe it’s resolved now that we use CURLOPT_FOLLOWLOCATION to follow the redirect, or maybe you guys solved it.