Lets be real for a second
1) the Nats want Harper. They didn’t offer him a 10 year deal for craps and giggles. Commitment to a 10 year deal means they want him
B) Boras leaked the offer to act as a baseline.
C) The reason we haven’t heard about other offers is because the Nationals haven’t been out bid in one of the key areas. Either annual salary, number of years, and/or total value.
D) Boras would have leaked the other offers if they were better to run up the total.
90% that’s all correct
You are making a buttload of assumptions but I will address just one. There was no "commitment" to keep a 10 year deal on the table. It was an offer that was probably only good for a few days.
Yes, they want him but negotiations ebb and flow. The Nats budget has changed and so has the market (I guess). They would not be out of line to adjust their offer up or down.