There are many academic fields where people work long hours for little pay, but I imagine theoretical CS is much more comfortable. I'm not surprised people have time and effort to spare, but they are still getting paid, you know. It just happens that the resume byline "conference organizer" is valuable enough in that field.

Sometimes conferences pay a publishing company to do the review process for submissions, by the way. I'm not sure that your submissions are actually getting processed for free by conference volunteers.

I'd rather not disclose details of my employer, sorry.

No conference in CS pays the publishing company (usually IEEE or ACM) to pick reviewers. None whatsoever. Instead, program committee (PC) chairs are selected, and they pick PC members who are responsible for reviews. All of this occurs on a volunteer basis, no matter which institution the PC chairs/members belong to.

> just happens that the resume byline "conference organizer" is valuable enough in that field.

Being editor of a journal/PC chair is a valuable thing in any field, not just CS.

> Sometimes conferences pay a publishing company to do the review process for submissions, by the way. I'm not sure that your submissions are actually getting processed for free by conference volunteers.

Well, I'm sure, because I also review for the same conferences and journals that I submit to!