how anyone can become mod of a specific board? what mod does when they become mod and how the interface on this forum look like after becoming mod?
do mod get paid? who pays to mods and how much they earn?
Souds like someone who's interested in moderation job but I don't think you stand a chance to become one for now. Trust matters when such position is involved. You shouldn't expect the forum to be pilot under the care of someone with questionable trust or into the hands of new account who knows nothing about the forum works and the principles guiding it privacy.
Concerning their payment, you are asking irrelevant questions. Even the civil servants do not entertain questions about their earning because it's like an invasion of privacy. The amount they earn as moderators is personal and the forum has made it clear that they should be seen as volunteers who wish to sacrifice for the forum willingly not like Forum employees.