I would think it's in Amazon's overall interest, not necessarily in Amazon.com's interest, to further ingratiate themselves in the developers community.
That being said, much of the TI development kits are sold at-cost, or even nearly below (see the launchpad series, $5 development boards), so it may not be as economically feasible for Amazon to match that pricing, giving that selling bulk chips aren't their business.
I know, I was implying that beagleboard/pandabaord may be being sold at a limited profit much like the launchpad boards, to attract interest to the platform.
I think the worst decision they could make would be to isolate development by killing off the nascent BB market.