Epic: VPN / Relay bundle offer

[alexgibson]

Description

The Privacy and Security team would like to begin offering VPN subscribers the chance to opt into adding in Relay to their subscription as a bundle. Specific details on pricing / country / language offerings are still being worked out, but the idea is that we would show an "Add Relay" option or checkbox to the VPN subscription offers. Opting-in to Relay would swap out the subscription link with an alternative stripe ID that maps to a dual subscription for both products.

Mana page: https://mana.mozilla.org/wiki/pages/viewpage.action?pageId=169411025

[slightlyoffbeat]

Possible dupe, or related: https://github.com/mozilla/bedrock/issues/11982

[alexgibson]

Proposed launch date: Oct 11th Date for QA start (on www-dev): Oct 6th. Launch countries: US and Canada only.

Production:

• product ID: prod_MIex7Q079igFZJ
• plan ID: price_1La3d7JNcmPzuWtRn0cg2EyH

Staging:

• product ID: prod_MQ9Zf1cyI81XS2
• plan ID: price_1LhJGWKb9q6OnNsLuCurigPk

Figma file: https://www.figma.com/file/vje77igIFc5wnW4lkP5thl/VPN-Bundle-Touchpoints?node-id=354%3A4679 (Mozilla access only).

Considerations:

• This will all need to be behind a switch, as QA will need time to test this on www-dev prior to launch (starting Oct 6th).
• For countries where the offer is not shown, the regular VPN offer (without Relay) will be displayed.
• We'll need to add some new logic to the VPN subscription button helper (possibly via a bundle_relay=True parameter?), that will swap out the product ID and select the plan ID from a new language/currency matrix. For now it sounds like the only possible combination will be English/USD.

[alexgibson]

Depends on https://github.com/mozilla/bedrock/issues/12156