Is Watchtower a Church or a Business Corporation

Jehovah’s Witnesses are using typical business therms instead of religious therms, e.g.
meetings not services, publishers not parishioners, talks not sermons, field service report (time card), obsessed by numbers, growths, hours worked.
On the other hand, they have no live music/choir, no charities, no transportation, no program for children and no assistance programs.
All is very unlikely for a religious organization.