ChatGPT offers a permanent Free plan with basic access. Occasionally, targeted...

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

ChatGPT offers a permanent Free plan with basic access. Occasionally, targeted promotions provide a trial of the Plus plan, which may require a payment card and auto-renews after the trial ends