Sometimes the links do not activate. Make sure the relevant part of the URL is in the link. For example: Statistics with SAS promo link: https://www.coursera.org/learn/sas-statistics?utm_medium=coursera&utm_source=promo Clicking this link will give you the banner, you will enrol in the programme and get the course for free. Statistics with SAS (non-promo link): https://www.coursera.org/learn/sas-statistics Clicking this link will not give you the banner so if you want the certificate you have to pay.
7 days free trial
It seems you can only subscribe to one of them: "Promotion Limit Reached Sorry, you reached the limit for redeeming the NY Activation Promo 21 courses."
Got the stats one, thanks.