Cost of doing business and price you would want to charge and what customers are willing to pay - all these would be different for different sales channels, dif

Cost of doing business and price you would want to charge and what customers are willing to pay - all these would be different for different sales channels, different geographies, different feature bundles etc. And it is perfectly logical and reasonable to charge different rates on that basis. It would be very surprising and most likely run afoul of anti-competitive laws in most countries if any particular channel/marketplace operator demanded its participants to keep price parity with all other channels in general. They could do that or even demand exclusivity for a limited period in exchange for other special considerations (like special promotions etc). But in general, quite unlikely.