Many channelers purport to be relaying information from the Pleadians, far out of proportion to the Pleadian influence on Earth at this time. The reason for this choice, among the many channelers who are faking it, is that the Pleadians are gentle speaking, not blunt, and focus on feel-good messages. It's all rather like the preamble to a sermon, without ever arriving at the sermon. It's like attending lectures without ever having to take an exam. The Pleadians don't relay messages that make humans uncomfortable, that's not their chosen role. They're greeters, the nice guys, easing humans into the concept of an alien presence with pleasantries. Consequently, those who claim to be channeling Pleadians don't get challenged to prove it, as no one is uncomfortable.
The drawback to the plethora of false channelers is the plethora of inaccuracies that follow. Barbara Marciniak claims to channel the Pleadians - she doesn't. She claims an ancient civilization lives in Antarctica - none does. She claims entities called Game Masters create civilizations - they don't. This is not to say that everything she might write would be a falsehood, it's just that it couldn't be trusted.