If you get the Position, you need to stay active as the Post states. If you are unactive for Long periods of time without notifying us why, we know you have a life but if it's just a "Can't be bothered going on in forever" mood you may be removed from your position.
If you've gotten to the point where you need to post on another forum that you need active staff on your forum, you don't need staff. You can do everything yourself until more activity comes.
It's enough for two admins and one staff member to handle with ease. It isn't like you get thousands of posts a day on the forum which in that case, you'd need staff.
You're tricking people on ForumKorner to come join your forum and be active in return you'll give them certain abilities they will barely be able to use as the forum will be too inactive or over-staffed to do anything.
I don't think looking for a staff wouldn't be a good idea, you should give a staff position to someone who will/is going to be active on your forum and know all the rules.
Thanks for the comments, This is no longer required + We are not tricking people to Join, we were giving them an opportunity. as @lurids stated we picked a trustworthy person.