I know there's some complexity here, but let's just take a minute to marvel at the phenomena of Walmart complaining about another company's excessive dominance and potential to apply monopolistic power.
We really are slipping into the 1870s.
But it is a better "military" tactic than an economy based on David defeating Goliath.
We discovered this during the industrial revolution, and the modern liberal democracy and ideas around fair play, consumer protection, competition as an important mechanism in a market economy, etc. grew out of what we learned.
Unfortunately, for some bizarre reason, we seem to be systematically dismantling most of those protections, despite knowing exactly what's going to happen. (Hint: it rhymes with 'huge, uncontrollable corporate behemoths owning all the means of production, channels of communication, and legislative agendas').
Of course, every generation seems to have its insane economic ideas. My great-grandparents had Communism. We have whatever you call the squirming progeny of identity politics brutally inseminated by Reaganomics.
It's worth noting that the USSR's model was also ridiculously inflexible, and the whole idea of a "5 year plan" probably sounded silly back then too.
Wal-mart hosts many Coinstar machines, but I have yet to see one that will produce Amazon gift certificates. You have to go to Coinstars hosted at grocery stores for that. So, they have a contract with Coinstar that specifically mentions which firms may have gift certificates on Coinstar machines.
Who knows, this may be a boon for the grocery stores?
http://www.coinstar.com/KioskFinder?element=Partner&parmName...