ChatGPT offers a permanent Free plan with basic access for all users....

https://papa-wiki.win/index.php/Why_Don%E2%80%99t_I_See_a_ChatGPT_Plus_Free_Trial_on_My_Account%3F

ChatGPT offers a permanent Free plan with basic access for all users. Occasionally, targeted users can try the Plus plan through promotional trials, which may require a payment card and auto-renew unless canceled