my credit limit is almost used up :-)

Hello, first of all, thank you very much for the great service. Unfortunately, my credit limit is almost used up. Are there any plans to offer this as a prepaid service so that credits can be added later? I have learned a lot in a very short time, including about AI, but what is a little annoying is the fact that there are so many corrections and then credits are lost. Otherwise, I am very satisfied. Thank you very much.