Freerolls are madness, fighting 1000 donkey's and fish, just like super micro's.
Your AKs you 4bet is gonna get called by 34s and they'll fish you out calling every street, requires a bit more attention to try and read peoples wild plays, no money to respect.
People are gonna jam A7s UTG because they got a vibe...
Good players experimenting with new styles, etc etc etc.
My favourite approach to these types is to seriously tighten up, but you can't be afraid they'll suck you out everytime, or you'll win tiny pots and get nowhere.
I very much so disagree with a lot of the sentiment towards freerolls, in here.
It will probably teach you poor poker unless you are already in the know, a bit.