ChatGPT offers a permanent Free plan anyone can use without a trial....

https://wiki-burner.win/index.php/Does_a_Virtual_Card_Work_for_a_ChatGPT_Plus_Trial_or_Will_It_Fail%3F

ChatGPT offers a permanent Free plan anyone can use without a trial. Occasionally, targeted Plus plan trials are available, which may require a payment method and auto-renew when the trial ends