Gaming and streaming are one scenario because they fail in the same way: a session that runs for hours, on a service that notices when the network underneath it changes. A rotating pool changes it on a timer, and what the service sees is not a new address but an interrupted session, a forced re-authentication, or a refusal. A static address does not move for the whole period you pay for, which is the property being bought and the only one that matters here. Two things follow from that. Latency is worth caring about, because interactive traffic is the one case where a slow hop is visible to a person rather than only to a log. And the address should belong to a consumer carrier rather than a hosting range, because a service that cares about session continuity usually also cares about what the network is. What no proxy can do is grant a licence you do not hold.