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

https://high-wiki.win/index.php/Can_I_Use_a_ChatGPT_Trial_More_Than_Once_on_the_Same_Account%3F

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