It's possible that there could be some viable use case for canned mayo. However, for the life of me I can't think of a reason to not only microwave the mayo, but the entire container at once.
Mayo is a lot more versatile than people think, makes a lot of sense if you think about it, but you can use mayo in place of eggs in a lot of recipes. Fried mayo is something you should probably never eat, but it can also be pretty great.