Dr. Yazdi told people not to come out in the streets until October 1st b/c he said he has reports from his agents within the IRI that the Iranian government are planning a demonstration to undermine the efforts.
However I dislike this guy and I think he is so silly, uneducated and full of superstitions but let me mention one important thing that today, Iranians desperately need to get rid of the Mullahs and that is why they even try to believe a silly guy like him.