I have just read about the concern of my registar about new price increase possibilities, 

im so much against it, this about the all people around the world, some of them barley have the money to renew the domains the own. same for me.

im totally against this possibility of price increase of .com domains! and im sure if it reached to 100% of the people who own .com domain all of them be against it!

keep it simple like the way it is now!