QoinPro, along with a few other Free Bitcoin websites, about a year ago, with a view to tryout the whole bitcoin thing for free, but also to review them. I didn't get around to writing the reviews until now (more coming soon).
The main way to get free Bitcoins is using faucets, which requires manual effort. I was tempted by QoinPro because after registering, which is free and quick, you don't have to do anything to get your bitcoins. They are added to your account automatically, daily.
You automatically get a minimum of 0.00000002630 bitcoins every 24 hours. The longer you are with them, and the more referrals you make, the bigger bonus you get. After being with them for about a year and referring one person, I get a 41% bonus and earn 0.00000003711 daily. However, I still haven't reached the minimum payout threshold of 0.00025500 BTC (inc the transfer fee).
You also receive DarkCoin, DigitalCoin, DogeCoin, FeatherCoin, FedoraCoin, InfiniteCoin, LiteCoin, PeerCoin and Virtacoin. My balances currently look like this:
|Coin||Code||Balance||Daily coins||Bonus||You receive|
To sign up, you just enter your email address and choose a password. As far as I can tell, they don't spam you or sell your email address, Well I haven't suddenly started getting spam about Bitcoins or other virtual currency anyway.
So my conclusion is that as it's quick and free, you don't have anything to lose by signing up, but unless you recruit loads of referrers, it will be a very long time before you can withdraw any money and even then, you won't make much.