The fibre cables are tough but technology is developing at such a rate that it could all be redundant before then. (telegraph.co.uk)
You would simultaneously need to find a fare which was exactly the maximum and also exactly the cheapest flight option to see such a rate of return on your points. (milenomics.com)
The researchers noted a slight decrease in such rates in 2014, followed by a slight increase in 2015. (sciencedaily.com)