Hello

1. Product with Price on Stript end is needed for Subscriptions only. If you sell Credits or something in Market (with One-Time price) then you don't need to create Products on Stripe end.

2. You can use user friendly names in Stripe products. Unique autogenerated names with dashes and numbers (like Premium-Yearly-8742) should be used as 'API ID' when you are creating a Price for your Product. This field is needed to do API calls in backend and isn't visible to common buyers.

3. If you have different prices (monthly and yearly) for some Paid Level on UNA you may have one Product in Stripe and 2 Prices in it. Each price will have its own 'API ID' connected to autogenerated name in UNA (Premium-Monthly, Premium-Yearly).