Power begets power, and that's just as true in markets as it is in politics. Large players have an entire playbook of dark, gray, and white strategies for getting a leg up on small players. Dumping, bundling, FUD, bribery, regulatory capture, moat-building, economies of scale, network effects, the list goes on.

A sizable fraction of large markets are dominated by monopolies or oligopolies. While it's arguable which factors contribute most, it's an observed fact that this happens, so I'm not sure I'd call any particular instance "a bit odd." Sadly.