i have a static, fc and very active linkshells - but aside off this there is another reason:

for me this is a game not a sport - I like exploring and even failing on my own, learning by myself instead of reading guides in the first way and most important I wanna enjoy new updates instead of mindless boring grind because the grind will find you anyway sooner or later if you wanna max out/main a new cls. thats why ^^

but yeah have fun in potd if it's the way you enjoy the game : )