By the commonplace colloquial definition. Economic taxonomy might call it an oligopsony, monopsony or whatnot.
To the average person, "really big powerful company that stands above ordinary competition and choice dynamics, influences politics, dominates a business sector or other realm, dictates rules to a market and such."
In many parts of the world, if you are a politician, journalist, celebrity or other public figure, twitter is extremely powerful... a determining factor in hundreds of thousands of careers. What trends on twitter trends in society.
But no, it doesn't fit neatly into a "cornered the market for turnips" box.
To the average person, "really big powerful company that stands above ordinary competition and choice dynamics, influences politics, dominates a business sector or other realm, dictates rules to a market and such."
In many parts of the world, if you are a politician, journalist, celebrity or other public figure, twitter is extremely powerful... a determining factor in hundreds of thousands of careers. What trends on twitter trends in society.
But no, it doesn't fit neatly into a "cornered the market for turnips" box.