So my understanding is that when I log in, my previous 6 private prompts disappear. If I want to save them, and possibly a few more, I have to pay 20 € / month. Ergo as much as for chatGPT itself. Don’t take offense, but this is too high.
If of your 600,000 users, as of today, 500,000 would book the small package a 2 € / month, and that is not so unlikely, we are talking about 120 million € per year. Congratulations, you have found the holy grail.
To close now constructively: For people who are still learning the subject and currently spend more time than save, the costs - especially in relation to the actual product - are too high. I would go along with up to 5€/month for currently still “gimmicky”.