The 10 whatevers each way is the most likely. They could have increased the priority boarding to accommodate those who want a seat, but this way they get more money without being seen to increase a price....
Presumably the same boarding thing will apply, except it will be the seat reservers first... In most airports with RyR in my experience the staff release the 'mob' pretty quickly after the rich and famous If they continue that there'll be some fun with the ones who haven't found their seats.....
Personally I will continue my regular policy - nothing extra for MO'L he's doing fine.