Maybe, BUT McDonald’s has always yearly brought back the McRib simply due to its popularity. I remember a time when they sold McRib sandwich year round when it was first introduced.
I suspect their gimmick is to enhance the McRib in some way and re-introduce it in six months. Probably a new sauce idea.
On sugar and fat content...it’s at a absolute maximum already.
It’s because the price of pork is seasonally cyclical. Its price collapse during the Holiday months.