This is wrong. Imagine if MTN or VodaCom started sending Catholic material to it's subscribers because it's shareholders are Catholic. Whatever the relationship, it is wrong as it sends unsolicited material to people who never requested it. Junk SMS. I think billboard or press is fine. But SMS is rather personal and intrusive to someone's privacy. What if I was Dutch, Hindu or Muslim? Would it be fair on me to to receive these SMS when I don't subscribe to this group? I think Econet is now (ab)using it's position as a company with large number of subscribers to start it's own agenda instead of sticking to the provision of telecom services.
This calls for some Advertising board to look into it. SMS on services of telecoms or anything related to that is fine. Anything else is spam