Today the Canadian Radio-television and Telecommunications Commission (CRTC) announced that Rogers Media, one of the largest mobile phone and cable companies in Canada, had agreed to pay $200,000 to resolve long running violations of Canada's Anti-Spam Law. For over a year, July 2014 to July 2015, Rogers sent e-mail with opt-out links that didn't work, or if they did work Rogers continued to send mail anyway. The details of the undertaking Rogers agreed to are here.
Rogers is a big sophisticated company, and there's no good reason they can't manage their mail to stop sending ads when people ask them to. This kind of spam is particularly hard to filter, since the same message might be sent to a Rogers customer who'd agreed to receive it, and to someone else who't told them to stop.