I guess you could make the time wasted argument, but thats lolworthy.
Time isn't lolworthy, in the end it is the most valuable thing.
people somehow requested it at some point.
A donation may not be free, but I think that is the closest thing to free.
Giving a gift to someone without them asking, that is free in a general sense.
I'm not going to get into the variations and depth that people can go, but yeah.
P.S. While waiting for queries/downloads to finish, or while waiting in lines i often go to the free sites also. And I enjoy giving as well, however I prefer to be able to measure the effect my Giving has and maximize the value of what it is I can give.
Peace!