In which OpenCode "collaborates" with OpenAI to support login with ChatGPT Pro/Plus (through this exact method!)
Not exactly proof that this method is "OpenAI allowed" but it's a good sign at least.
Not disagreeing with you (and based on your other comments you're probably aware of this info) - just adding context on why this is a pretty interesting gray area and I'm similarly curious whether OpenAI will explicitly allow, disallow, or maintain ambiguity towards it.
1- It's against the ToS obviously. The analogy I've used in the past that seemed to catch on is that it's like going to an all you can eat buffet, bringing your whole extended family and trying to pay once.
2- Legals and ethics aside, don't build products that competitively rely on this, the moment they patch it you will be out of business, it's like making a business out of blackhat SEO during the Google era. At least if you are going to do it, cash out quick, you are in the rug pull space.