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

https://wiki-coast.win/index.php/How_Do_I_Know_If_My_ChatGPT_Trial_Will_Auto-Renew_and_Charge_Me%3F

ChatGPT offers a permanent Free plan anyone can use without time limits. Occasionally, targeted users receive a free trial for the Plus plan, which may need a payment method and auto-renews when the trial ends