I generally dont like freerolls much since their very big and thus will take lots of time and opponents dont have anything to loose. In my book the first hour or so in a freeroll you just sit and wait for hands to go all in with since there always will be some that do that. And doesnt take much skill to do that. In the late stage its almost normal poker since people begin to realize that they stand to gain something. So ye i would say winning a free roll takes some fair skill and lot of luck. Id say you got alot of patience playing for hmm like 5 hours to gain like 3 dollars and it will serve you well should you play for own money in the future.

Congrats on your win.