Well first of all, yes it is stealing to take something that does not belong to you. The definition of stealing is not beholden to the consequences of the actions itself.
Furthermore, if you pirate to avoid paying a subscription, then yes they are losing something. I'm a massive pirate. I steal all my media. I feel no guilt and I also have no delusions about what I am doing. I do it to save money.
Is it stealing when they don't lose anything?
Well first of all, yes it is stealing to take something that does not belong to you. The definition of stealing is not beholden to the consequences of the actions itself.
Furthermore, if you pirate to avoid paying a subscription, then yes they are losing something. I'm a massive pirate. I steal all my media. I feel no guilt and I also have no delusions about what I am doing. I do it to save money.