Well having people who stopped playing toribash and stopped watching anime since 2012 be on the list was unfair.
Like you said, Anime Champions is just for fun but it's not fun when all the champions were inactive for 3 years.
It not like champions will get replaced quickly, I only update this around twice each season, so if someone goes 4 or 5 months without having watched any anime then I assume they don't watch anime anymore and should be replaced by someone who does, which is only fair. If said person who got replaced decides to come back and watch anime, he will get his/her position back.
Anime Champions is small motivation for those want to become well versed in anime.
Plus I didn't particularly watch a lot of anime just to get on the list, sure it started out like that when I first started watching anime and Anime champions was a goal only a newbie could dream of, only once I got to 180 anime watched did I realise I was close to the current champions and then just by watching my normal intake of anime I managed to surpass some champions and make it in.
You really think I'd watch 2 months worth of anime to get on a list that I now run? That'd be weird and pointless. Besides I'm sure you like your position on the list too, suppose you were to be removed, you'd feel disappointed and upset would you not?