ChatGPT offers a permanent Free plan accessible to all users. Occasionally,...

https://andressuniquechat.cloudhinter.com/posts/why-do-two-people-get-different-chatgpt-trial-offers

ChatGPT offers a permanent Free plan accessible to all users. Occasionally, targeted promotions provide a free trial of the Plus plan, which may require a payment card and auto-renews when the trial ends