There needs to be some streaming service that caters to connoisseurs of schlock. Otherwise, a huge part of our cultural history will be wiped away. While many of these films are available on blu-ray, with more coming out each month, it's good they're also available for the streaming crowd.
It would depend on whether or not you count DK, Wario and Yoshi as part of the Mario franchise or separate. Scratch that, there are more Mario characters even with just the mushroom symbol people but it's a close call.