Sounds like a typical freeroll to me.
If you play a while it you will be surprised how much can be won in a pot with 33 compared to AA. Many times in a freeroll there will be those chasing straights/flushes/etc and catching them on the turn or the river. Eventually you will learn which hands to stay out of when that is a Possibility and someone is betting/calling/raising those types of flops.
Good Luck and Good Games!