Question about emails and cc'ing a company

I just got a promotional offer from a company where I was encouraged to send the email to 5 friends, CC the company, and 1 group would be chosen for free tickets.

With CASL, are those friends now eligible to receive emails from the company in question? If they Reply All to my email, in effect CC'ing the company as well, do they then grant permission to the company to add them to their newsletter?