The snag is that multi-carrier signals do not travel as far as single-carrier ones, so they require the construction of expensive repeater stations.

ECONOMIST: Power-line technology

Ticket prizes do not include any costs such as travel and accommodation.

BBC: The Eavesdrop: Terms & Conditions

But even if more people do travel, they will probably not spend as much.

ECONOMIST: On the road again? | The

Since they do not penetrate the market as much as legacy carriers and fewer people are vying for seats, the chances for reward travel are better.

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