faucets are good for those who only start to get aqquainted with bitcoins,yeah.get some bitcoins,then buy some altcoins or invest them 
Faucets are good for those who have just joined bitcoin world and has no idea if how to do something else to earn bitcoins, so these people should start claiming bitcoins from faucets until they learn everything.
Faucets are good for those who haven't been in bitcointalk.org and haven't read that there are ways to get much bigger amount than what they earn in faucets. New comers always take advantage of any opportunity that comes in their way, too bad that not all of them have been here and read about what are really paying and what are not.