Hmm...there is already a standing tradition of welcoming people to the boards when they first post...expanding it with the gift of XP would probably reinforce ENWorld's rep as a friendly place.
Of course, if you want to reward that person again before the XP system's "repeat limit" has been met, you might be miffed.
Of course, if you want to reward that person again before the XP system's "repeat limit" has been met, you might be miffed.