I have one I made over a year ago and it is used daily. I don't do anything
special. I wash it with dish water and spray it with bleach ... all the stuff
they say not to do. It looks great. I know if I stop using it for a while I
should soak it with mineral oil (to stop it from drying out and splitting) but
that isn't likely.
My maple counter tops have poly on them. They are counters, not cutting boards