What does "subscription payments" mean?
Subscriptions payment refers to the money paid when one is subscribing or signing up with a certain program. Some websites requires you to pay in order to sign up with them and that money can be referred to as subscriptions payment.
Payments that you make every month. Ex: Netflix has a subscription system that costs 10$ a month.
You pay if you are subscribed. It may be monthly , yearly. For magazines , you may pay per subscription which is like when you receive a different magazine