Time to charge for some premium features!
The storage costs of prompts is minimal, but if you're a heavy user, you're probably approaching 100 prompts, which is our free-tier limit. This is actually a pretty generous free-tier. Some others only offer 20 prompts. So, now, if you subscribe, you can get many more Prompts saved in your library. And they can be 40% longer than with the free tier.
You also will get credits every month you're subscribed so you can run workflows more without getting throttled.
Enjoy!