Hello I'm using vercel postgres database on hobby plan for more than 37 days. I haven't exceed usage limits, but I can't see monthly limits haven't been renewed after the 30 days.
I want to make sure if I'm understand correctly that monthly limits are renewed each 30 days on Hobby plan. If so, please support or feedback regarding this issue
Hobby doesn't have a monthly billing cycle the way that Pro does. Instead, usage is calculated with a rolling 30 day window. So Hobby usage never really goes back to 0 unless you pause everything for more than 30 days.
Storage is reported as the maximum amount used, so I wouldn't expect to see that go down unless you removed a lot of data and waited for the higher max to fall off the 30 day window. Written data and data transfer would have a similar delay.
I hope that helps! 
Thank you for clarification. I appreciate the quick and helpful response!