The SDK - for AppGameKit and DBP users - is all about protection. It means you can only use it by having AppUp installed and being connected to the internet for verification.
Without it, your game could be picked up from the install folder and copied, unless you have other copy protection included.
My game is paid-for, but I don't want people to be tied to an internet connection, it may not always be available where they are using the App. I also intend to tighten up security in future versions, working on the theory that if it's worth pirating (I hope so!) then people may pay for the additional features in a future upgrade.
Quote: "i am trying to evaluate here, and looking for the big black monster to jump out all of a sudden!"
For Tier one, there is no big monster, it's just a very slow, trudging beast that takes time to execute.
Tier 2 should be the same, as the labour-intensive part starts after you have a working game.