Well, it is obvious that moderators get pays as it is a full time job and who has time to do such work without any incentive? Also, there is a difference between doing the job voluntarily without getting paid as you can get relax a bit and doing the same thing with pay as then it becomes a responsibility.
You are right, because the work of moderators is definitely not a easy one, so why would they not want to get paid for doing hard work. Even if they start to work voluntarily still they might not make up time to moderate things here on BTT. Because that way it will not be there responsibility and i know that. As, i have also faced such situations.
That's why i put the statement in my reply that, its an childish thought, but i always wanted to know how much a moderator might be getting paid. Maybe one day i would also apply to become one.