To coincide with the release of Spider-Man: Homecoming, Post cereal hasa teamed up with Marvel to outdo the publisher by offering a current two-part Spider-Man digital comic. Like most good things, like universal health care and poutine, it's only available in Canada.
In January, Marvel announced a change to the way their digital code system worked. Instead of offering a digital copy of the same issue you purchased, that code will now unlock two different digital comics. Each week the free comics will change, creating repeat consumers and increasing revenue, expanding market-share and appeasing shareholders.