ChatGPT offers a free plan that anyone can use without time limits....

https://penelopessmartdigests.talesignal.com/posts/is-there-any-way-to-fix-my-account-so-i-get-a-chatgpt-plus-trial

ChatGPT offers a free plan that anyone can use without time limits. Occasionally, targeted users may get a Plus plan trial, which sometimes requires a payment card and auto-renews after the trial ends