I’m not asking asking this as a put-down, but is English not your first language? Allow me to try and say it all differently.
What you’re saying is that the people perform the necessary tasks without expecting did be paid for their labor, but some ask contributions for it.
What OP was asking is what those people (the ones running a site to maken the fruit of their labor available to others) have to pay in order to make it available.
We’re well aware that the labor is possibly free.
But it still costs someone money to host a site with a domain name and the ability for other people to download anything. That’s what OP was asking about, those costs to the person providing the files that get pirated by others.