ChatGPT offers a permanent Free plan anyone can use without time limits....

https://wiki-spirit.win/index.php/Why_Does_ChatGPT_Plus_Cost_$20_a_Month_After_the_Trial_Ends%3F

ChatGPT offers a permanent Free plan anyone can use without time limits. Occasionally, targeted users get a Plus trial, which may require a credit card and auto-renews after the trial ends