Here in Richmond BC, about one birth a day in our local hospital is to a non resident.  Last year all but four were to mothers of Chinese nationality. We have illegal birthing hotels set up in the City for the sole purpose of providing pre and post natal care, and helping of course with the paperwork. 

Mothers pay the hospital about $7000 for a regular delivery, and about 12,000 for a C-section. No doubt middle-man fees add more to that.  Because of Canada's ten year renewable visitors visas, parents can stay and raise their children here.