For recurring billing – if Stripe is incontrol of the subscription payments, Klaviyo’s integration with Stripe will record each time a payment is processed. I tested it and a free trial of $0 was recorded and then 3 days later a $25 payment for the same subscription was recorded in Klaviyo as well.
This is a good way to keep track of recurring orders and adds a Metric that can used – Stripe “Successfully paid” – Segments and flows can be based off of this metric.