Most (maybe all?) paid streaming subscriptions are set up to pre-pay for a subscription period and are nonrefundable. They renew automatically if you don't cancel before the end of the current subscription period. When you cancel, it prevents getting charged for the next subscription period but your pre-paid subscription remains in force until it expires.
Roku Streaming Stick +, 3810X, Ser YH0059427035, wifi - Samsung UN55ES6100
Roku Streaming Stick, 3600X, Ser 5S56D8240827, wifi - JVC EM37T