Epic: Implement free tier for individuals in usage-based billing

[jankeromnes]

Summary

Implement a free tier for individuals in usage-based billing.

Context

https://www.notion.so/gitpod/UBP-Individual-Tier-343575c38d0e432588a38732cd7362b4 (internal)

Value

• Translate the existing Chargebee-based free tier into our new usage-based billing with Stripe

• Continue providing an amazingly useful service for free to individuals, open source developers, early adopters and other tinkerers and Gitpod enthusiasts ❤️

Acceptance Criteria

• The new Stripe/usage-based free tier should be functionally equivalent to the old Chargebee-based free tier

Measurement

• 100% of new Gitpod users land in the new Stripe/usage-based free tier on sign-up, and none in the current Chargebee-based free tier

TODOs:

• Create a new Stripe Price for individuals with a built-in free tier (using Stripe's Graduated Pricing)
• Add the new individual Stripe Price IDs to Gitpod's configuration #13307
• When usage-based individuals upgrade by adding a credit card, subscribe them to the new Stripe Price with built-in free tier #13302
• Adjust cost centers and usage limits depending to spec #13389
• Prevent individuals from changing their monthly usage limit until they upgrade with a credit card
• For upgraded individuals, allow modifying the monthly usage limit (but with a minimum value corresponding to the base paid package)
• Update billing page layout for teams and personal accounts #13405
  Clearly show the free tier, usage, usage limit, and upgrade path in individual usage-based billing settings

[jankeromnes]

Closing this epic as done. 🎉 ✅