If this is an experiment...

[Infinite]

    If this is an experiment put on by the One Creator in order to learn more about him/her/it-self, and the Third Density (what we're in now) is all about Free Will and making the "correct" choice of "Service-to-Others," why do we have contact with entities of a higher density that are assisting/informing us to making the "correct" choice?

Ra explains this:

The general cause of service such as the Confederation offers is that of the primal distortion of the Law of One, which is service. The One Being of the creation is like unto a body, if you will accept this third-density analogy. Would we ignore a pain in the leg? A bruise upon the skin? A cut which is festering? No. There is no ignoring a call. We, the entities of sorrow, choose as our service the attempt to heal the sorrow which we are calling analogous to the pains of a physical body complex distortion

(14.18)

They (STO entities) do this out of love, because they perceive everything as One and therefore make themselves available to help us.