We've recently migrated a large segment of stores to Product Subscription Plans. This means these stores are now eligible to access new features, including the new subscription widget

Additionally, Product Subscription Plans allows more flexibility with plan set-up:

• Different discount percentages for different frequencies
• Different frequency units for the same product (days, weeks, months)
• Channel settings - show different discounts on the widget vs. the customer portal
• Onetime plan discounts - give your existing subscribers discounts on onetime products added to their next order from the customer portal

How to know if your store has been upgraded:
If you now see all of your Shopify products listed and editable in the Recharge merchant portal, your store is on Product Subscription Plans. More details can be found here.