Is the Pizza Hut bookmark from Vodafone or Samsung? I have a Galaxy S 3 from T-Mobile and I don't have any bookmarks like that. It does have useless undeletable T-Mobile apps, but that's clearly T-Mobile's fault.
I guess so. I'm not sure they have as much leverage as Apple did with the iPhone. (Fun aside: Verizon was Apple's first choice for a launch carrier, but Verizon balked at the level of control they wanted over the device. Well, that and the cut of the monthly data plan fee.)
And then Verizon hemorrhaged customers until the CDMA iPhone 4 came out. I doubt people would be willing to switch carriers to get the Galaxy S5 (there is a lot of substitute goods in the Android world), nor does Samsung care to find out.