Pay us $x to connect our network to Y network to your Z network, our our millions of Y users won't have access to customers on your Z network, and that will mak

Pay us $x to connect our network to Y network to your Z network, our our millions of Y users won't have access to customers on your Z network, and that will make the Z network look bad to your customers. Of course, it goes the other way - Y looks bad because they can't get to Z's customers - but I suspect the commercial customers on Z might be more likely to ditch Z rather than the end users (who probably don't understand the situation) ditching Y.