Class participation emails deadline extended again

I am required to have the class participation attendance because of some government law, so I am not sure how long I can extend this date. More than 100 student have still not sent me this email. It is amazing that more than 100 students are not even visiting the website to  look at messages and screencasts. I am extending the deadline for the last time to Sunday midnight, Jan. 23. Send me the email exactly as described a few messages below.