I'm surprised the legitimate ones still exist.

Say there are 10 such sites each which allow 1 freebie per 24 hour period.

Let's say an enterprising individual has a way to secure 10,000 IP addresses per day and each one pays on average 0.0001 BTC

Then:

10,000 * 10 * .0001 = 10 BTC

= $1050 USD / day (at $105 USD = 1 BTC)

It's good to see people haven't ruined it for others by now if free bitcoins are truly still being given out.