Most of the time in the current era you're not paying for software. You're paying for software as a service. You're paying someone to take on the operational aspects of running a service because to you the value is in using the software, not in operating it. It's all opportunity cost.
Sure, reframing the terminology further onto the paradigm of centralization doesn't change what I said. I don't pay for software, nor services aimed at replacing what can be self-representing software.
Speaking of opportunity costs - yes, you do pay an opportunity cost to find, set up, and learn software that represents your interests. But then down the line, you continually save on opportunity costs from hostile software not continually having you over a barrel. Because while you're correct that the value comes from using the software, outsourcing the operation of it is a trap that will continually try to capture more and more of the surplus value you'd otherwise gain from using it.
