Multipath TCP (MPTCP) is a resource pooling mechanism which splits data across multiple subflows (paths) and ensures reliable data delivery. Although Multipath TCP is a relatively small technical change to the TCP protocol providing improved resilience, throughput and session continuity, it will have considerable impact on the value networks and business models of Internet access provisioning. In this paper, we evaluate the viability of different MPTCP deployment scenarios and present what new ISP business models might be enabled by the new flexibility that MPTCP brings. This allows the research community to focus on the most promising deployment scenarios.