ChatGPT offers a free plan that anyone can use with no time limit....

https://raymondsinterestingchat.quantlynix.com/posts/what-s-the-fastest-way-to-see-if-my-account-has-any-chatgpt-trial-banner

ChatGPT offers a free plan that anyone can use with no time limit. Occasionally, targeted users get free trials for the ChatGPT Plus plan, which may require a payment card and will auto-renew unless canceled