Big or small picture, the fact is that Samsung's market share has been falling for quite some time. The new design from the Galaxy flagships was supposed to be the hero feature the company desperately needed but failed to be reason enough for people to buy and/or switch to Samsung phones.You fail to see the bigger picture. Samsung is more focused on it's mobile brand at the moment. Trying to meet sales for it's flagship phones is most likely just a short term goal to level share prices. Q4 is about to start soon along with the holiday season. This kind of promotion only makes sense.
T-mobile and Samsung are basically allies like AT&T and Apple were. T-mobile is the only one of the 4 big carriers offering one free year of Netflix. That not desperation, that's being smart.
On top of that, they fail to realize that the mid-range Android market is where Android is heading. People are starting to realize that Samsung phones are always heavily discounted after a couple of months to be able to compete with Apple and are also starting to realize that mid-range Android phones such as Motorolas are more than powerful enough to do the job.