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

https://city-wiki.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 with no time limit. Occasionally, targeted users get Plus trials that may require a card and auto-renew unless canceled