I sometimes want to put a game on more than one computer i.e. the Win 7 laptop as well as the old XP and notice that sometimes, even with buying a disc, there's a message saying that you can only install the game say 3 times or something similar.
With Big Fish, you can install the game on as many of your computers as you want. Of course if you install it on 1000 computers they may start to wonder about you. I'm pretty sure Steam allows you to install your games as many times as you like also -- you just have to use Steam to install.
Some game companies, like Viva Media, have started making disc versions with limited activations, but they're not all like that.
Anyway it was really only the security issue that I was wondering about with these Game Managers because I notice with Steam they seem to be there in the background on my new computer every time I turn it on - now I'm considering uninstalling it when I've finished playing Secret Files 3. What do people here think?
The security issue with Steam is probably not so much from the client installed on your computer so much as your Steam account information being stolen if their servers are hacked. I don't know if there's anything particularly insecure about Steam, but it tends to be a target.