I think the second paragraph refers to the fact that some providers, not just VoIP providers, don't handle their own inbound services. To give an example we have some dealings with a company that does lines, calls, data circuits, SIP trunks and hosted telephony. All billing comes from this company. However on the inbound side their numbers are routed from Gamma. So in any port away from them Gamma is the "losing provider" and any port to them Gamma is the gaining provider.