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

https://gregorysbrilliantchat.lucialpiazzale.com/what-happens-when-a-chatgpt-free-trial-ends-do-i-lose-my-chats

ChatGPT offers a permanent Free plan anyone can use without time limits. Occasionally, Plus plan trials are available as targeted promotions. Some trials require a payment card and will auto-renew into a paid Plus subscription once the trial ends