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Acuario
That's all well and good except for the unavoidable issue of Programme Rights, the cost of which is predicated on the potential "in-area" audience plus actuarially assessed overspill.
The overspill can be reduced with state of the art Satellites, so that in itself adds fuel to the Rights negotiations.
Also, one must consider the opinions and influence that other players, including regulators, have: And the expectation will be for pressure to reduce out-of-area reception both by applying the technological state-of-the-art and by keeping an eye on how BSkyB police their own Terms & Conditions (Which are themselves predicated upon many factors and influences, and are well known).
BSkyB can turn a relatively blind eye only while they can get away with it - No doubt there is a tacit balance.