From that Vancouver Sun article:
"Such smaller telecom providers as TekSavvy built a business model around unlimited download packages to compete against such larger providers as Bell and Rogers, which use bandwidth caps."
That's not entirely true. We signed up due to the whole package they offered: Considerably lower monthly price, no contracts, customer service people in Canada, a business mantra that doesn't involve trying to squeeze every last drop out of its customers, and yes, higher usage caps. We don't have an unlimited plan, because we don't need it. But we absolutely need more than 25GB, and probably 60GB/month. The only real drawback is the speed, and as far as I understand it, that's mainly due to Bell not offering those services to re-sellers. That, or they're slagging on the infrastructure, despite it being heavily subsidized by the government (pretty sure), and their making hundreds of millions, if not billions of dollars a year.